PlatformGraphics: Properly handle transparency in drawPixels(short)

Seems to fix basically all Karma Studios games. (See Issue #50)

Note: They don't render properly unless FreeJ2ME matches their
expected resolution, so keep that in mind.

src/org/recompile/mobile/PlatformGraphics.java

@@ -708,7 +708,7 @@ public void drawPixels(short[] pixels, boolean transparency, int offset, int sca
 			{
 				int index = offset + (col) + (row * scanlength);
 				data[row * width + col] = pixelToColor(pixels[index], format);
-				if (!transparency) { data[row * width + col] &= 0x00FFFFFF; } // Clear the alpha channel
+				if (!transparency) { data[row * width + col] = (data[row * width + col] & 0x00FFFFFF) | 0xFF000000; } // Set alpha to 255
 			}
 		}