fix undefined pointer comparison in wmemmove

diff --git a/src/string/wmemmove.c b/src/string/wmemmove.c
index e406f3d5c8dfc2af79b992c9f1fa6cfc80c12ec6..d58cebac989185687d9b0f6c2062279a162f425f 100644 (file)
--- a/src/string/wmemmove.c
+++ b/src/string/wmemmove.c
@@ -1,9 +1,10 @@
 #include <wchar.h>
+#include <stdint.h>
 
 wchar_t *wmemmove(wchar_t *d, const wchar_t *s, size_t n)
 {
        wchar_t *d0 = d;
-       if ((size_t)(d-s) < n)
+       if ((uintptr_t)d-(uintptr_t)s < n * sizeof *d)
                while (n--) d[n] = s[n];
        else
                while (n--) *d++ = *s++;