make unexec_free handle NULL the same way free does

* unexmacosx.c (unexec_free): Ignore a NULL argument.

2 files changed, 7 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 6361f522fe7..a936794edc7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2008-06-12  Jim Meyering  <meyering@redhat.com>
+
+        make unexec_free handle NULL the same way free does
+        * unexmacosx.c (unexec_free): Ignore a NULL argument.
+
 2008-06-12  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * character.h (CHAR_TO_BYTE_SAFE): New macro.
diff --git a/src/unexmacosx.c b/src/unexmacosx.c
index 46622601281..57f70f8557f 100644
--- a/src/unexmacosx.c
+++ b/src/unexmacosx.c
@@ -1318,6 +1318,8 @@ unexec_realloc (void *old_ptr, size_t new_size)
 void
 unexec_free (void *ptr)
 {
+  if (ptr == NULL)
+    return;
   if (in_dumped_exec)
     {
       if (!ptr_in_unexec_regions (ptr))