Convert a lonely ISSPACE().
---
v2: New.
--- a/gas/config/tc-m32r.c
+++ b/gas/config/tc-m32r.c
@@ -989,7 +989,7 @@ assemble_two_insns (char *str1, char *st
{
char *s2 = str1;
- while (ISSPACE (*s2++))
+ while (is_whitespace (*s2++))
continue;
--s2;