Fix C4267 and C4244 warnings in Visual Studio 2017 compile

src/consumption.cpp

@@ -274,7 +274,7 @@ std::map<vitamin_id, int> player::vitamins_from( const item &it ) const
                 for( const auto &mat : mut.vitamin_absorb_multi ) {
                     // this is where we are able to check if the food actually is changed by the trait
                     if( mat.first == material_id( "all" ) || material_exists( mat.first, it ) ) {
-                        std::map<vitamin_id, float> mat_vit_map = mat.second;
+                        std::map<vitamin_id, double> mat_vit_map = mat.second;
                         // finally iterate over every vitamin in each material
                         for( const auto &vit : res ) {
                             // to avoid errors with undefined keys, and to initialize numbers to 1 if undefined

src/item_factory.cpp

@@ -2648,7 +2648,7 @@ void item_group::debug_spawn()
     uilist menu;
     menu.text = _( "Test which group?" );
     for( size_t i = 0; i < groups.size(); i++ ) {
-        menu.entries.emplace_back( i, true, -2, groups[i] );
+        menu.entries.emplace_back( static_cast<int>( i ), true, -2, groups[i] );
     }
     while( true ) {
         menu.query();
@@ -2674,7 +2674,7 @@ void item_group::debug_spawn()
         for( const auto &e : itemnames2 ) {
             std::ostringstream buffer;
             buffer << e.first << " x " << e.second << "\n";
-            menu2.entries.emplace_back( menu2.entries.size(), true, -2, buffer.str() );
+            menu2.entries.emplace_back( static_cast<int>( menu2.entries.size() ), true, -2, buffer.str() );
         }
         menu2.query();
     }

src/lightmap.cpp

@@ -408,7 +408,8 @@ void map::generate_lightmap( const int zlev )
                 continue;
             }
             if( vp.has_feature( VPFLAG_CARGO ) && !vp.has_feature( "COVERED" ) ) {
-                add_light_from_items( pp, v->get_items( p ).begin(), v->get_items( p ).end() );
+                add_light_from_items( pp, v->get_items( static_cast<int>( p ) ).begin(),
+                                      v->get_items( static_cast<int>( p ) ).end() );
             }
         }
     }
@@ -1139,10 +1140,10 @@ void map::build_seen_cache( const tripoint &origin, const int target_z )
             seen_cache[mirror_pos.x][mirror_pos.y] < LIGHT_TRANSPARENCY_SOLID + 0.1 ) {
             continue;
         } else if( !vp.info().has_flag( "CAMERA_CONTROL" ) ) {
-            mirrors.emplace_back( vp.part_index() );
+            mirrors.emplace_back( static_cast<int>( vp.part_index() ) );
         } else {
             if( square_dist( origin, mirror_pos ) <= 1 && veh->camera_on ) {
-                cam_control = vp.part_index();
+                cam_control = static_cast<int>( vp.part_index() );
             }
         }
     }

src/mutation.h

@@ -184,7 +184,7 @@ struct mutation_branch {
         std::map<vitamin_id, time_duration> vitamin_rates;
 
         // Mutations may affect absorption rates of vitamins based on material (or "all")
-        std::map<material_id, std::map<vitamin_id, float>> vitamin_absorb_multi;
+        std::map<material_id, std::map<vitamin_id, double>> vitamin_absorb_multi;
 
         std::vector<trait_id> prereqs; // Prerequisites; Only one is required
         std::vector<trait_id> prereqs2; // Prerequisites; need one from here too

src/mutation_data.cpp

@@ -302,7 +302,7 @@ void mutation_branch::load( JsonObject &jo, const std::string & )
     auto vam = jo.get_array( "vitamins_absorb_multi" );
     while( vam.has_more() ) {
         auto pair = vam.next_array();
-        std::map<vitamin_id, float> vit;
+        std::map<vitamin_id, double> vit;
         auto vit_array = pair.get_array( 1 );
         // fill the inner map with vitamins
         while( vit_array.has_more() ) {

src/trait_group.cpp

@@ -82,7 +82,7 @@ void trait_group::debug_spawn()
     uilist menu;
     menu.text = _( "Test which group?" );
     for( size_t i = 0; i < groups.size(); i++ ) {
-        menu.entries.emplace_back( i, true, -2, groups[i].str() );
+        menu.entries.emplace_back( static_cast<int>( i ), true, -2, groups[i].str() );
     }
     while( true ) {
         menu.query();
@@ -108,7 +108,7 @@ void trait_group::debug_spawn()
         for( const auto &e : traitnames2 ) {
             std::ostringstream buffer;
             buffer << e.first << " x " << e.second << "\n";
-            menu2.entries.emplace_back( menu2.entries.size(), true, -2, buffer.str() );
+            menu2.entries.emplace_back( static_cast<int>( menu2.entries.size() ), true, -2, buffer.str() );
         }
         menu2.query();
     }