Fixed the rg11b10f canvas format, removed rgb9e5 due to lack of real support, improved love.graphics.hasCanvasFormat to do extra checks

--HG--
branch : Canvas-formats

src/modules/graphics/opengl/Canvas.h

@@ -50,7 +50,6 @@ public:
 		FORMAT_RGB5A1,
 		FORMAT_RGB565,
 		FORMAT_RGB10A2,
-		FORMAT_RGB9E5,
 		FORMAT_RG11B10F,
 		FORMAT_RGBA16F,
 		FORMAT_RGBA32F,
@@ -158,6 +157,8 @@ private:
 	void setupGrab();
 	void drawv(const Matrix &t, const Vertex *v);
 
+	static bool supportedFormats[FORMAT_MAX_ENUM];
+
 	static StringMap<Format, FORMAT_MAX_ENUM>::Entry formatEntries[];
 	static StringMap<Format, FORMAT_MAX_ENUM> formats;