Fix build error in SDL_render_metal.m (bug #4916.) Patch provided by Konrad. Error was introduced by commit 522164980828 for bug #4914.
diff --git a/src/render/metal/SDL_render_metal.m b/src/render/metal/SDL_render_metal.m
index f8ab1fc..6c43dd4 100644
--- a/src/render/metal/SDL_render_metal.m
+++ b/src/render/metal/SDL_render_metal.m
@@ -949,6 +949,7 @@ METAL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
static void
METAL_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture, SDL_ScaleMode scaleMode)
{ @autoreleasepool {
+ METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata;
if (scaleMode == SDL_ScaleModeNearest) {