Bug #25643811: MYSQL DOES NOT COMPILE WITH GCC 7

cmd-line-utils/libedit/terminal.c:366:28:
warning: comparison between pointer and zero character constant [-Wpointer-compare]

Author: Tor Didriksen

cmd-line-utils/libedit/terminal.c

@@ -363,7 +363,7 @@ terminal_alloc(EditLine *el, const struct termcapstr *t, const char *cap)
          */
 	tlen = 0;
 	for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
-		if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
+		if (*tmp != NULL && **tmp != '\0' && *tmp != *str) {
 			char *ptr;
 
 			for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)