fix OG bug with illegal pistols equip (closes #30)

Tomb1Main.json

@@ -116,5 +116,10 @@
 
     // Enables calculating the number of secrets based on a trigger count
     // within a file rather than using hardcoded values.
-    "fix_hardcoded_secret_counts": true
+    "fix_hardcoded_secret_counts": true,
+
+    // Fixes ability to obtain pistols by running out of ammo with other guns.
+    // (Happens if you get to shotgun before obtaining pistols in Natla's
+    // Mines)
+    "fix_illegal_gun_equip": true
 }

src/config.c

@@ -115,6 +115,7 @@ int T1MReadConfig()
     READ_BOOL(fix_tihocan_secret_sound);
     READ_BOOL(fix_pyramid_secret_trigger);
     READ_BOOL(fix_hardcoded_secret_counts);
+    READ_BOOL(fix_illegal_gun_equip);
 
     T1MConfig.healthbar_showing_mode =
         ReadBarShowingMode(json, "healthbar_showing_mode");

src/config.h

@@ -58,6 +58,7 @@ struct {
     int8_t fix_tihocan_secret_sound;
     int8_t fix_pyramid_secret_trigger;
     int8_t fix_hardcoded_secret_counts;
+    int8_t fix_illegal_gun_equip;
 } T1MConfig;
 
 int T1MReadConfig();

src/game/larafire.c

@@ -9,6 +9,7 @@
 #include "game/misc.h"
 #include "game/sphere.h"
 #include "game/vars.h"
+#include "config.h"
 #include "util.h"
 
 void LaraGun()
@@ -415,7 +416,13 @@ int32_t FireWeapon(
     if (ammo->ammo <= 0) {
         ammo->ammo = 0;
         SoundEffect(48, &src->pos, 0);
+#ifdef T1M_FEAT_OG_FIXES
+        if (!T1MConfig.fix_illegal_gun_equip || Inv_RequestItem(O_GUN_ITEM)) {
+            Lara.request_gun_type = LGT_PISTOLS;
+        }
+#else
         Lara.request_gun_type = LGT_PISTOLS;
+#endif
         return 0;
     }