pp.c: Add missing assert

The comments say there is an assert, but it wasn't there.

1 files changed, 1 insertions, 0 deletions

diff --git a/pp.c b/pp.c
index 880f266081..cde8fa51f7 100644
--- a/pp.c
+++ b/pp.c
@@ -3890,6 +3890,7 @@ PP(pp_ucfirst)
 
 		/* Assert tculen is 2 here because the only two characters that
 		 * get to this part of the code have 2-byte UTF-8 equivalents */
+                assert(tculen == 2);
 		*d++ = *tmpbuf;
 		*d++ = *(tmpbuf + 1);
 		s++;	/* We have just processed the 1st char */