Fix integer type

Change int to i32 so it is the correct size

core/sys/windows/ux_theme.odin

@@ -3,7 +3,7 @@ package sys_windows
 
 foreign import uxtheme "system:UxTheme.lib"
 
-MARGINS :: distinct [4]int
+MARGINS :: distinct [4]i32
 PMARGINS :: ^MARGINS
 
 @(default_calling_convention="system")