parser.h: Make nexttoke unsigned

This is to avoid a compiler warning at toke.c:1912 (the assertion in
S_force_next).  The only values this member can contain are 0 to 5, so
this change is safe.  (I’ll probably change it to U8 after 5.22.)

1 files changed, 1 insertions, 1 deletions

diff --git a/parser.h b/parser.h
index 2806578703..ffc60d3cf4 100644
--- a/parser.h
+++ b/parser.h
@@ -100,7 +100,7 @@ typedef struct yy_parser {
 
     YYSTYPE	nextval[5];	/* value of next token, if any */
     I32		nexttype[5];	/* type of next token */
-    I32		nexttoke;
+    U32		nexttoke;
 
     COP		*saved_curcop;	/* the previous PL_curcop */
     char	tokenbuf[256];