custom fix for open CV warning

Author: pifopi

3rdParty/opencv2/core/types.hpp

@@ -1851,8 +1851,10 @@ template<typename _Tp> inline
 _Tp Rect_<_Tp>::area() const
 {
     const _Tp result = width * height;
-    CV_DbgAssert(!std::numeric_limits<_Tp>::is_integer
-        || width == 0 || result / width == height); // make sure the result fits in the return value
+    if constexpr (std::numeric_limits<_Tp>::is_integer)
+    {
+        CV_DbgAssert(width == 0 || result / width == height); // make sure the result fits in the return value
+    }
     return result;
 }