WindowConfig min_size: replace Option<Size> with Size

druid/src/app.rs

@@ -41,7 +41,7 @@ pub struct AppLauncher<T> {
 /// It does not include anything related to app data.
 pub struct WindowConfig {
     pub(crate) size: Option<Size>,
-    pub(crate) min_size: Option<Size>,
+    pub(crate) min_size: Size,
     pub(crate) position: Option<Point>,
     pub(crate) resizable: Option<bool>,
     pub(crate) show_titlebar: Option<bool>,
@@ -189,7 +189,7 @@ impl Default for WindowConfig {
     fn default() -> Self {
         WindowConfig {
             size: None,
-            min_size: Some(WINDOW_MIN_SIZE),
+            min_size: WINDOW_MIN_SIZE,
             position: None,
             resizable: None,
             show_titlebar: None,
@@ -233,7 +233,7 @@ impl WindowConfig {
     /// [`window_size`]: #method.window_size
     /// [display points]: struct.Scale.html
     pub fn with_min_size(mut self, size: impl Into<Size>) -> Self {
-        self.min_size = Some(size.into());
+        self.min_size = size.into();
         self
     }
 
@@ -287,9 +287,6 @@ impl WindowConfig {
         if let Some(size) = self.size {
             builder.set_size(size);
         }
-        if let Some(min_size) = self.min_size {
-            builder.set_min_size(min_size);
-        }
 
         if let Some(position) = self.position {
             builder.set_position(position);
@@ -302,6 +299,8 @@ impl WindowConfig {
         if let Some(state) = self.state {
             builder.set_window_state(state);
         }
+
+        builder.set_min_size(self.min_size);
     }
 
     /// Apply this window configuration to the passed in WindowHandle