check return value of alloc functions, from Charles Longeau

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@21745 ec53bebd-3082-4978-b11e-865c3cabbd6b

kadmin/get.c

@@ -87,6 +87,8 @@ static int
 add_column(struct get_entry_data *data, struct field_name *ff, const char *header)
 {
     struct field_info *f = malloc(sizeof(*f));
+    if (f == NULL)
+	return ENOMEM;
     f->ff = ff;
     if(header)
 	f->header = strdup(header);