Check the right pointer against NULL;

fixing a pasto introduced in the previous commit;
found by Svyatoslav Mishyn <juef at openmailbox dot org> with cppcheck.

diff --git a/usr.bin/mandoc/mandoc_aux.c b/usr.bin/mandoc/mandoc_aux.c
index 7e7e19d..0536595 100644 (file)
--- a/usr.bin/mandoc/mandoc_aux.c
+++ b/usr.bin/mandoc/mandoc_aux.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: mandoc_aux.c,v 1.6 2015/10/11 21:06:59 schwarze Exp $ */
+/*     $OpenBSD: mandoc_aux.c,v 1.7 2015/10/12 21:09:08 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -89,7 +89,7 @@ mandoc_strdup(const char *ptr)
        char    *p;
 
        p = strdup(ptr);
-       if (ptr == NULL)
+       if (p == NULL)
                err((int)MANDOCLEVEL_SYSERR, NULL);
        return p;
 }