reduced a few ifdefs, fixed an unused warning if built w/o SDL_HAVE_YUV.

src/render/direct3d/SDL_render_d3d.c

@@ -670,10 +670,9 @@ D3D_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
             (void *) ((Uint8 *) texturedata->pixels + rect->y * texturedata->pitch +
                       rect->x * SDL_BYTESPERPIXEL(texture->format));
         *pitch = texturedata->pitch;
-    } else {
-#else
-    {
+    } else
 #endif
+    {
         RECT d3drect;
         D3DLOCKED_RECT locked;
         HRESULT result;
@@ -992,8 +991,10 @@ SetDrawState(D3D_RenderData *data, const SDL_RenderCommand *cmd)
     const SDL_BlendMode blend = cmd->data.draw.blend;
 
     if (texture != data->drawstate.texture) {
+#if SDL_HAVE_YUV
         D3D_TextureData *oldtexturedata = data->drawstate.texture ? (D3D_TextureData *) data->drawstate.texture->driverdata : NULL;
         D3D_TextureData *newtexturedata = texture ? (D3D_TextureData *) texture->driverdata : NULL;
+#endif
         LPDIRECT3DPIXELSHADER9 shader = NULL;
 
         /* disable any enabled textures we aren't going to use, let SetupTextureState() do the rest. */

src/render/metal/SDL_render_metal.m

@@ -606,7 +606,7 @@ METAL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
             mtltexdesc.usage = MTLTextureUsageShaderRead;
         }
     }
-    
+
     id<MTLTexture> mtltexture = [data.mtldevice newTextureWithDescriptor:mtltexdesc];
     if (mtltexture == nil) {
         return SDL_SetError("Texture allocation failed");
@@ -657,10 +657,9 @@ METAL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
         texturedata.fragmentFunction = SDL_METAL_FRAGMENT_NV12;
     } else if (texture->format == SDL_PIXELFORMAT_NV21) {
         texturedata.fragmentFunction = SDL_METAL_FRAGMENT_NV21;
-    } else {
-#else
+    } else
+#endif
     {
-#endif /* SDL_HAVE_YUV*/
         texturedata.fragmentFunction = SDL_METAL_FRAGMENT_COPY;
     }
 #if SDL_HAVE_YUV
@@ -903,10 +902,9 @@ METAL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
 #if SDL_HAVE_YUV
     if (texturedata.yuv || texturedata.nv12) {
         buffersize = ((*pitch) * rect->h) + (2 * (*pitch + 1) / 2) * ((rect->h + 1) / 2);
-    } else {
-#else
-    {
+    } else
 #endif
+    {
         buffersize = (*pitch) * rect->h;
     }