fix file check and avoid segfault

diff --git a/ext/fileinfo/fileinfo.c b/ext/fileinfo/fileinfo.c
index c0cc47e84a99d0c2f60d6b9de2bd68a3cac775e6..e3f938d8fce9027f9dac8599246a6de348e97c89 100644 (file)
--- a/ext/fileinfo/fileinfo.c
+++ b/ext/fileinfo/fileinfo.c
@@ -316,7 +316,7 @@ PHP_FUNCTION(finfo_open)
                RETURN_FALSE;
        }
 
-       if (*file) { /* user specified filed, perform open_basedir checks */
+       if (file && *file) { /* user specified filed, perform open_basedir checks */
                if (!VCWD_REALPATH(file, resolved_path)) {
                        RETURN_FALSE;
                }