[d3d9] Fail GetRTData if src and dst have mismatching sizes

MySims tries to do this and needs this to fail,
otherwise mouse picking is off.

src/d3d9/d3d9_device.cpp

@@ -1037,6 +1037,17 @@ namespace dxvk {
     if (srcTexInfo->Desc()->Format != dstTexInfo->Desc()->Format)
       return D3DERR_INVALIDCALL;
 
+    D3DSURFACE_DESC srcSurfDesc;
+    D3DSURFACE_DESC dstSurfDesc;
+    if (unlikely(src->GetDesc(&srcSurfDesc) != D3D_OK)) {
+      return D3DERR_INVALIDCALL;
+    }
+    if (unlikely(dst->GetDesc(&dstSurfDesc) != D3D_OK)) {
+      return D3DERR_INVALIDCALL;
+    }
+    if (srcSurfDesc.Width != dstSurfDesc.Width || srcSurfDesc.Height != dstSurfDesc.Height)
+      return D3DERR_INVALIDCALL;
+
     if (dstTexInfo->Desc()->Pool == D3DPOOL_DEFAULT)
       return this->StretchRect(pRenderTarget, nullptr, pDestSurface, nullptr, D3DTEXF_NONE);