remove useless if-before-free tests

In case you're wondering about whether this change is safe from a
portability standpoint, fear not.  This has been beaten to death
in other forums.  Here are a few threads:

  http://thread.gmane.org/gmane.comp.version-control.git/74187
  http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/12712
  http://thread.gmane.org/gmane.emacs.devel/98144
  http://thread.gmane.org/gmane.comp.lib.glibc.alpha/13092

There has been debate about whether it's a good idea from a
performance standpoint, too, but imho you'll have a hard time
finding an instance where this sort of change induces a
measurable performance penalty.  If you do, please let me know.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/intl/loadmsgcat.c b/intl/loadmsgcat.c
index c8fc46d..7fab71a 100644
--- a/intl/loadmsgcat.c
+++ b/intl/loadmsgcat.c
@@ -1372,8 +1372,7 @@
       /* This is an invalid revision.  */
     invalid:
       /* This is an invalid .mo file.  */
-      if (domain->malloced)
-	free (domain->malloced);
+      free (domain->malloced);
 #ifdef HAVE_MMAP
       if (use_mmap)
 	munmap ((void *) data, size);
@@ -1405,8 +1404,7 @@
 
   _nl_free_domain_conv (domain);
 
-  if (domain->malloced)
-    free (domain->malloced);
+  free (domain->malloced);
 
 # ifdef _POSIX_MAPPED_FILES
   if (domain->use_mmap)