is_mode should not assert, as it is used in the dumper

[r3256]

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index 78bfd3d..2240d14 100644 (file)
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -523,7 +523,6 @@ get_mode_NAN(ir_mode *mode)
 
 int
 is_mode (void *thing) {
-  assert(thing);
   if (get_kind(thing) == k_ir_mode)
     return 1;
   else