Unittest genacht (Versuch1)

Anpassung an create Matrix

Startcode/matrix.c

@@ -24,6 +24,7 @@ Matrix createMatrix(unsigned int rows, unsigned int cols){
            fprintf(stderr, "Error, matrix could not be created...\n");
            matrix.rows = 0;
            matrix.cols = 0;
+           matrix.buffer = NULL;
        }
 
        return matrix;