dwarves: __tag__has_type_loop has to handle a NULL type (void)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

dwarves.c

@@ -50,6 +50,9 @@ int __tag__has_type_loop(const struct tag *self, const struct tag *type,
 {
 	char bbf[2048], *abf = bbf;
 
+	if (type == NULL)
+		return 0;
+
 	if (self->type == type->type) {
 		int printed;
 

regtest

@@ -224,7 +224,9 @@ def main(argv):
 				dirname = args[0]
 				if len(args) > 1:
 					fnames = args[1:]
-				elif o in ('before', 'after', 'ctf'):
+				elif o in ('-a', '--after',
+					   '-b', '--before',
+					   '-C', '--ctf_encode'):
 					fnames = listdebugs(dirname)
 
 			if o in ('-b', '--before', '-a', '--after'):