nm: Stop processing ar members on first invalid offset.

Otherwise we will keep looping on that same invalid entry.

https://bugzilla.redhat.com/show_bug.cgi?id=1170810

Reported-by: Alexander Cherepanov <cherepan@mccme.ru>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/src/nm.c b/src/nm.c
index 4f2e0e7..6a9f8e1 100644
--- a/src/nm.c
+++ b/src/nm.c
@@ -468,7 +468,7 @@
 		{
 		  error (0, 0, gettext ("invalid offset %zu for symbol %s"),
 			 arsym->as_off, arsym->as_name);
-		  continue;
+		  break;
 		}
 
 	      printf (gettext ("%s in %s\n"), arsym->as_name, arhdr->ar_name);