direct3d: Fix possibly-incorrect scissor test when clearing.

Thanks to @JayFoxRox who did the detective work on this!

Fixes #3357.

src/render/direct3d/SDL_render_d3d.c

@@ -1319,9 +1319,9 @@ D3D_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *verti
                 const int backw = istarget ? renderer->target->w : data->pparams.BackBufferWidth;
                 const int backh = istarget ? renderer->target->h : data->pparams.BackBufferHeight;
 
-                if (data->drawstate.cliprect_enabled) {
+                if (data->drawstate.cliprect_enabled || data->drawstate.cliprect_enabled_dirty) {
                     IDirect3DDevice9_SetRenderState(data->device, D3DRS_SCISSORTESTENABLE, FALSE);
-                    data->drawstate.cliprect_enabled_dirty = SDL_TRUE;
+                    data->drawstate.cliprect_enabled_dirty = data->drawstate.cliprect_enabled;
                 }
 
                 /* Don't reset the viewport if we don't have to! */