plug libltdl memory leak with deplibs

[Eric Blake]

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I noticed this while debugging a memory leak in m4.  This is against head,
but if it is approved, I imagine it needs to be backported to the branch
as well.  OK to apply?

2006-10-02  Eric Blake  <address@hidden>

        * libltdl/ltdl.c (load_deplibs): Avoid memleak on failure.
        (unload_deplibs): Avoid memleak on unload.

- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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Index: libltdl/ltdl.c
===================================================================
RCS file: /sources/libtool/libtool/libltdl/ltdl.c,v
retrieving revision 1.244
diff -u -p -r1.244 ltdl.c
--- libltdl/ltdl.c      4 Sep 2006 17:43:37 -0000       1.244
+++ libltdl/ltdl.c      3 Oct 2006 11:52:25 -0000
@@ -855,7 +855,7 @@ load_deplibs (lt_dlhandle handle, char *
 
       cur->deplibs = (lt_dlhandle *) MALLOC (lt__handle, depcount);
       if (!cur->deplibs)
-       goto cleanup;
+       goto cleanup_names;
 
       for (i = 0; i < depcount; ++i)
        {
@@ -903,6 +903,7 @@ unload_deplibs (lt_dlhandle handle)
              errors += lt_dlclose (cur->deplibs[i]);
            }
        }
+      FREE (cur->deplibs);
     }
 
   return errors;