intel: Add a width field to regions, and use it for making miptrees in TFP.

Otherwise, we would use the pitch as width of the texture, and compiz would
render the pitch padding on the right hand side.

src/mesa/drivers/dri/intel/intel_fbo.c

@@ -296,7 +296,7 @@ intel_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
       DBG("Allocating %d x %d Intel RBO (pitch %d)\n", width,
 	  height, pitch);
 
-      irb->region = intel_region_alloc(intel, cpp, pitch, height);
+      irb->region = intel_region_alloc(intel, cpp, width, height, pitch);
       if (!irb->region)
          return GL_FALSE;       /* out of memory? */