fix failure of mbsrtowcs to record stop position when dest is full

diff --git a/src/multibyte/mbsrtowcs.c b/src/multibyte/mbsrtowcs.c
index 75a493c..b9bbc33 100644 (file)
--- a/src/multibyte/mbsrtowcs.c
+++ b/src/multibyte/mbsrtowcs.c
@@ -54,7 +54,10 @@ resume0:
                wn--;
                c = 0;
        } else for (;;) {
-               if (!wn) return wn0;
+               if (!wn) {
+                       *src = (const void *)s;
+                       return wn0;
+               }
                if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
                        while (wn>=4 && !(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
                                *ws++ = *s++;