Shader uniforms keep their values after love.window.setMode (resolves issue #1174).

Also allow arrays of images/samplers in shaders, although driver support is iffy and you have to index into the array using a compile-time constant (which might exclude loop indexing).

--HG--
branch : minor

src/modules/graphics/opengl/OpenGL.h

@@ -106,8 +106,8 @@ public:
 
 	enum FramebufferTarget
 	{
-		FRAMEBUFFER_READ = (1 << 1),
-		FRAMEBUFFER_DRAW = (1 << 2),
+		FRAMEBUFFER_READ = (1 << 0),
+		FRAMEBUFFER_DRAW = (1 << 1),
 		FRAMEBUFFER_ALL  = (FRAMEBUFFER_READ | FRAMEBUFFER_DRAW),
 	};