Make IW4 menu rect def align be unsigned like IW5

src/Common/Game/IW4/IW4_Assets.h

@@ -2084,8 +2084,8 @@ namespace IW4
         float y;
         float w;
         float h;
-        char horzAlign;
-        char vertAlign;
+        unsigned char horzAlign;
+        unsigned char vertAlign;
     };
 
     enum WindowDefStaticFlag : unsigned int

src/ObjLoading/Game/IW4/Menu/MenuConverterIW4.cpp

@@ -34,8 +34,8 @@ namespace IW4
                 static_cast<float>(rect.y),
                 static_cast<float>(rect.w),
                 static_cast<float>(rect.h),
-                static_cast<char>(rect.horizontalAlign),
-                static_cast<char>(rect.verticalAlign)
+                static_cast<unsigned char>(rect.horizontalAlign),
+                static_cast<unsigned char>(rect.verticalAlign)
             };
         }
 
@@ -46,8 +46,8 @@ namespace IW4
                 static_cast<float>(rectRelativeTo.y + rect.y),
                 static_cast<float>(rect.w),
                 static_cast<float>(rect.h),
-                static_cast<char>(rect.horizontalAlign),
-                static_cast<char>(rect.verticalAlign)
+                static_cast<unsigned char>(rect.horizontalAlign),
+                static_cast<unsigned char>(rect.verticalAlign)
             };
         }