Fix "...without parentheses is ambuguous" warning for UTF-8 function names

While isWORDCHAR_lazy_if is UTF-8 aware, checking advanced byte-by-byte.
This lead to errors of the form:

   Passing malformed UTF-8 to "XPosixWord" is deprecated
   Malformed UTF-8 character (unexpected continuation byte 0x9d, with
     no preceding start byte)
   Warning: Use of "�" without parentheses is ambiguous

Use UTF8SKIP to advance character-by-character, not byte-by-byte.

1 files changed, 1 insertions, 1 deletions

diff --git a/toke.c b/toke.c
index e8bb706883..f974b1c699 100644
--- a/toke.c
+++ b/toke.c
@@ -1841,7 +1841,7 @@ S_check_uni(pTHX)
 	PL_last_uni++;
     s = PL_last_uni;
     while (isWORDCHAR_lazy_if(s,UTF) || *s == '-')
-	s++;
+	s += UTF ? UTF8SKIP(s) : 1;
     if ((t = strchr(s, '(')) && t < PL_bufptr)
 	return;