Adam Strzelecki to SDL

When graphic card has no GL_ARB_texture_rectangle YUV textures mapped with SDL_RenderCopy are stretched 2x horizontally, so only left half of texture is visible. This is due:
       data->texw = (GLfloat) (texture->w) / texture_w;
       data->texh = (GLfloat) texture->h / texture_h;
But afterwards texture_w /= 2 for YUV texture, but data->texw stays as it was before, while it should be multiplied 2x.

This bug can be seen in any program setting env variables: GL_APPLE_ycbcr_422=0 GL_EXT_texture_rectangle=0 GL_ARB_texture_rectangle=0

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404468

src/video/SDL_renderer_gl.c

@@ -829,11 +829,14 @@ GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
 
     /* YUV formats use RGBA but are really two bytes per pixel */
     if (internalFormat == GL_RGBA && bytes_per_pixel(texture->format) < 4) {
+        texture_w /= 2;
+        if (data->type == GL_TEXTURE_2D) {
+            data->texw *= 2.0f;
+        }
         data->HACK_RYAN_FIXME = 2;
     } else {
         data->HACK_RYAN_FIXME = 1;
     }
-    texture_w /= data->HACK_RYAN_FIXME;
 
     data->format = format;
     data->formattype = type;