Fix warning. Cast the bitmapInfo parameter for CGBitmapContextCreate.…

… This is safe to do - from docs "The constants for specifying the alpha channel information are declared with the CGImageAlphaInfo type but can be passed to this parameter safely.

SMPageControl.m

@@ -360,7 +360,7 @@ - (CGImageRef)createMaskForImage:(UIImage *)image CF_RETURNS_RETAINED
 	size_t pixelsWide = image.size.width * image.scale;
 	size_t pixelsHigh = image.size.height * image.scale;
 	int bitmapBytesPerRow = (pixelsWide * 1);
-	CGContextRef context = CGBitmapContextCreate(NULL, pixelsWide, pixelsHigh, CGImageGetBitsPerComponent(image.CGImage), bitmapBytesPerRow, NULL, kCGImageAlphaOnly);
+	CGContextRef context = CGBitmapContextCreate(NULL, pixelsWide, pixelsHigh, CGImageGetBitsPerComponent(image.CGImage), bitmapBytesPerRow, NULL, (CGBitmapInfo)kCGImageAlphaOnly);
 	CGContextTranslateCTM(context, 0.f, pixelsHigh);
 	CGContextScaleCTM(context, 1.0f, -1.0f);