opkg: fix error message reporting caused by an uninitialized variable

SVN-Revision: 15057

package/opkg/patches/005-uninitialized_err.patch

@@ -0,0 +1,16 @@
+--- a/libopkg/pkg_hash.c
++++ b/libopkg/pkg_hash.c
+@@ -367,8 +367,11 @@ pkg_t *pkg_hash_fetch_best_installation_
+      abstract_pkg_t *apkg = NULL;
+      pkg_t *ret;
+ 
+-     if (!(apkg = abstract_pkg_fetch_by_name(hash, name)))
+-	  return NULL;
++     if (!(apkg = abstract_pkg_fetch_by_name(hash, name))) {
++	if (err)
++	  *err = 0;
++	return NULL;
++     }
+ 
+      ret = pkg_hash_fetch_best_installation_candidate(conf, apkg, pkg_name_constraint_fcn, apkg->name, 0, err);
+