Resolve typechange issues on Windows.

MSVC sometimes makes enums signed instead of unsigned. This isn't an
issue except when using Bindgen, which we are now doing. So, we cast to
the correct type (u32) at origin from ui-sys.

Author: NoraCodes

iui/src/controls/layout.rs

@@ -280,12 +280,12 @@ pub enum GridAlignment {
 impl GridAlignment {
     fn into_ui_align(self) -> uiAlign {
         use self::GridAlignment::*;
-        match self {
+        return match self {
             Fill => ui_sys::uiAlignFill,
             Start => ui_sys::uiAlignStart,
             Center => ui_sys::uiAlignCenter,
             End => ui_sys::uiAlignEnd 
-        }
+        } as uiAlign;
     }
 }
 
@@ -305,12 +305,12 @@ pub enum GridInsertionStrategy {
 impl GridInsertionStrategy {
     fn into_ui_at(self) -> uiAt {
         use self::GridInsertionStrategy::*;
-        match self {
+        return match self {
             Leading => ui_sys::uiAtLeading,
             Top => ui_sys::uiAtTop,
             Trailing => ui_sys::uiAtTrailing,
             Bottom => ui_sys::uiAtBottom 
-        }
+        } as uiAlign;
     }
 }
 

iui/src/draw/brush.rs

@@ -26,7 +26,7 @@ impl Brush {
         match *self {
             Brush::Solid(ref solid_brush) => BrushRef {
                 ui_draw_brush: uiDrawBrush {
-                    Type: ui_sys::uiDrawBrushTypeSolid,
+                    Type: ui_sys::uiDrawBrushTypeSolid as u32,
 
                     R: solid_brush.r,
                     G: solid_brush.g,
@@ -45,7 +45,7 @@ impl Brush {
             },
             Brush::LinearGradient(ref linear_gradient_brush) => BrushRef {
                 ui_draw_brush: uiDrawBrush {
-                    Type: ui_sys::uiDrawBrushTypeLinearGradient,
+                    Type: ui_sys::uiDrawBrushTypeLinearGradient as u32,
 
                     R: 0.0,
                     G: 0.0,
@@ -64,7 +64,7 @@ impl Brush {
             },
             Brush::RadialGradient(ref radial_gradient_brush) => BrushRef {
                 ui_draw_brush: uiDrawBrush {
-                    Type: ui_sys::uiDrawBrushTypeRadialGradient,
+                    Type: ui_sys::uiDrawBrushTypeRadialGradient as u32,
 
                     R: 0.0,
                     G: 0.0,
@@ -85,7 +85,7 @@ impl Brush {
                 // These don't work yet in `libui`, but just for completeness' sake…
                 BrushRef {
                     ui_draw_brush: uiDrawBrush {
-                        Type: ui_sys::uiDrawBrushTypeImage,
+                        Type: ui_sys::uiDrawBrushTypeImage as u32,
 
                         R: 0.0,
                         G: 0.0,