gcc.dg/strcmpopt_6.c: Add space in array for terminator.

gcc/testsuite/ChangeLog

+2020-02-18  Jon Beniston <jon@beniston.com>
+
+	* gcc.dg/strcmpopt_6.c: Add space in array for terminator.
+
 2020-02-18  Mark Eggleston <markeggleston@gcc.gnu.org>
 
 	PR fortran/93714

gcc/testsuite/gcc.dg/strcmpopt_6.c

@@ -33,7 +33,7 @@ test_strlen_lt6_strcmp_abcd (const char *s)
 __attribute__ ((noclone, noinline)) int
 test_strcpy_strcmp_abc (const char *s)
 {
-  char a[4];
+  char a[5];
   strcpy (a, s);
   return strcmp (a, "abc") == 0;
 }