Address unlikely memleak in zimatcopy interface (#1129)

* fix unlikely memleak in zimatcopy interface

* fix only unlikely memleak in zimatcopy interface

* fix only unlikely memleak in zimatcopy interface

interface/zimatcopy.c

@@ -251,7 +251,7 @@ void CNAME( enum CBLAS_ORDER CORDER, enum CBLAS_TRANSPOSE CTRANS, blasint crows,
 		}
 
 	}
-
+	free(b);
 	return;
 
 }