Fix scans of more than one character in %[]

This got broken in d8e877a89dae, where we returned 0 on the
first mismatch; we want to return 0 only when we consumed no
characters.

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/src/libstdio/vfscanf.c b/sys/src/libstdio/vfscanf.c
index d811b7803..be5c71284 100644
--- a/sys/src/libstdio/vfscanf.c
+++ b/sys/src/libstdio/vfscanf.c
@@ -339,6 +339,7 @@ static int icvt_sq(FILE *f, va_list *args, int store, int width, int type){
 	int c, nn;
 	register char *s;
 	register const char *pat;
+
 	pat=++fmtp;
 	if(*fmtp=='^') fmtp++;
 	if(*fmtp!='\0') fmtp++;
@@ -354,12 +355,12 @@ static int icvt_sq(FILE *f, va_list *args, int store, int width, int type){
 		}
 		if(!match(c, pat)){
 			nungetc(c, f);
-			return 0;
+			goto Done;
 		}
 		if(store) *s++=c;
 		nn++;
 	}
 Done:
 	if(store) *s='\0';
-	return 1;
+	return nn > 0;
 }