scst_get_unique_sess_name(): Handle out-of-memory properly (merge r4656 from trunk)

git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/2.2.x@4776 d57e44dd-8a1f-0410-8b47-8ef2f437770f

scst/src/scst_targ.c

@@ -6347,6 +6347,7 @@ restart:
 					PRINT_ERROR("Unable to allocate a "
 						"replacement name (size %d)",
 						len);
+					break;
 				}
 			}