fix comparison warning

diff --git a/win32/ioutil.c b/win32/ioutil.c
index a3f8f251b9d2f02f1f6af4bc7cdd359d3e00ba51..bd2f16f8310868567e4ac16f4a25d185f5105f61 100644 (file)
--- a/win32/ioutil.c
+++ b/win32/ioutil.c
@@ -521,7 +521,7 @@ PW32IO php_win32_ioutil_normalization_result php_win32_ioutil_normalize_path_w(w
                return PHP_WIN32_IOUTIL_NORM_FAIL;
        }
 
-       while (NULL != (pos = wcschr(idx, PHP_WIN32_IOUTIL_FW_SLASHW)) && idx - *buf <= len) {
+       while (NULL != (pos = wcschr(idx, PHP_WIN32_IOUTIL_FW_SLASHW)) && (size_t)(idx - *buf) <= len) {
                *pos = PHP_WIN32_IOUTIL_DEFAULT_SLASHW;
                idx = pos++;
        }