Promoted unsupported BASED NUMBER from warning to error

Because the resulting verilog had the unsupported notation BASE#NUMBER#.
Moreover, the 'ERROR:' string was added when an error is informed.

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/based.vhd b/examples/based.vhd
index 9ac5af9..1a8d2a1 100644
--- a/examples/based.vhd
+++ b/examples/based.vhd
@@ -10,6 +10,6 @@ begin
   foo2 <= 2#00101101110111#;
   foo8 <= 8#0177362#;
   foo10<= 10#01234#;
-  foo11<= 11#01234#;
+  --foo11<= 11#01234#;
   foo16<= 16#12af#;
 end rtl;