solved clear matrix for Test 3

matrix.c

@@ -25,7 +25,9 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
 
 void clearMatrix(Matrix *matrix)
 {
-    
+    matrix->rows = 0;
+    matrix->cols = 0;
+    matrix->buffer = NULL;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)