Do not use = 0 for a cv::Mat.

There are several operator= overloads and some compilers can be confused.

Author: vrabaud

modules/alphamat/src/cm.cpp

@@ -92,7 +92,7 @@ void lle(my_vector_of_vectors_t& indm, my_vector_of_vectors_t& samples, float ep
     float alpha, beta, lagrangeMult;
     Cones = 1;
 
-    C = 0;
+    C.setTo(0);
     rhs = 1;
 
     int i, ind = 0;