Made conversion from BitmapColor to Color more explicit...

by using operator Color()

(cherry picked from commit 08275c12)

Change-Id: I26350c3d47e37064b5a8674f75c9822753994a17

Corrected color conversion from BitmapColor to Color

(cherry picked from commit b0b8e385)

drawinglayer/source/texture/texture3d.cxx

@@ -125,9 +125,9 @@ namespace drawinglayer
                 }
                 case TRANSPARENT_COLOR:
                 {
-                    const Color aColor(mpReadBitmap->GetColor(rY, rX));
+                    const BitmapColor aBitmapColor(mpReadBitmap->GetColor(rY, rX));
 
-                    if(maBitmapEx.GetTransparentColor() == aColor)
+                    if(maBitmapEx.GetTransparentColor() == aBitmapColor.operator Color())
                     {
                         return 255;
                     }