removed "not fully implemented" warning for nullif

src/interfaces/ecpg/ChangeLog

@@ -1134,5 +1134,9 @@ Thu Oct 18 12:57:04 CEST 2001
 
 	- Added patch by Lee Kindness <lkindness@csl.co.uk> fixing several
 	  bugs.
+
+Fri Oct 19 16:32:06 CEST 2001
+
+	- Removed "not yet fully implemented" warnig for nullif.
 	- Set ecpg version to 2.9.0.
         - Set library version to 3.3.0.

src/interfaces/ecpg/preproc/preproc.y

@@ -3608,8 +3608,6 @@ case_expr:  CASE case_arg when_clause_list case_default END_TRANS
                 | NULLIF '(' a_expr ',' a_expr ')'
                                 {
 					$$ = cat_str(5, make_str("nullif("), $3, make_str(","), $5, make_str(")"));
-
-					mmerror(ET_NOTICE, "NULLIF() not yet fully implemented");
                                 }
                 | COALESCE '(' expr_list ')'
                                 {