[PATCH] Fix two ext[23] uninitialized warnings

There is a code path that passed size to ext2_xattr_set
(ext3_xattr_set_handle) before initializing it.  The callees don't use the
value in that case, but gcc cannot tell.  Always initialize size to get rid
of the warnings.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>