Merge pull request #11353 from eecsninja:3.4

* Fix CV_Asserts with negation of strings

{!"string"} causes some compilers to throw a warning.

The value of the string is not that important -- it's only for printing
the assertion message.

Replace these calls with:

  CV_Error(Error::StsError, "string")

to suppress the warning.

* remove unnecessary 'break' after CV_Error()

modules/core/include/opencv2/core/affine.hpp

@@ -445,7 +445,7 @@ void cv::Affine3<T>::rotation(const cv::Mat& data)
         rotation(_rvec);
     }
     else
-        CV_Assert(!"Input matrix can only be 3x3, 1x3 or 3x1");
+        CV_Error(Error::StsError, "Input matrix can only be 3x3, 1x3 or 3x1");
 }
 
 template<typename T> inline