misc.c: in cm_mbchar check string!=NULL before dereferencing it

2021-06-02 19:56:28 -06:00
parent 297918bb56
commit 53c35daea1
1 changed files with 2 additions and 2 deletions
@@ -639,7 +639,7 @@ cm_mbchar(char *str) {
          free(buf);
          buf = NULL;
     }
-     if ( *string == '\0' ) {
+     if ( string != NULL && *string == '\0' ) {
          free(string_head);
          string_head = NULL;
          string      = NULL;
@@ -652,7 +652,7 @@ cm_mbchar(char *str) {
               string += num_byte;
          }
     }
- 
+
     return buf;
 }