re PR libstdc++/55413 ([LTO] hashtable.h:1648 '__bbegin_bkt' may be used uninitialized in this function [-Werror=maybe-uninitialized])

2012-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/55413
	* include/bits/hashtable.h (_Hashtable<>::_M_rehash_aux): Initialize
	__bbegin_bkt and __prev_bkt to avoid uninitialized warnings.
	* testsuite/23_containers/unordered_set/instantiation_neg.cc: Adjust
	dg-error line number.

From-SVN: r193663