Fix for bug #13667 (Inconsistency for decimal(m,d) specification.

mysql-test/r/type_newdecimal.result:
  result fixed
mysql-test/t/type_newdecimal.test:
  testcase added
sql/sql_parse.cc:
  we should check if 'decimals' is not null

mysql-test/r/type_newdecimal.result

@@ -1019,3 +1019,5 @@ drop procedure wg2;
 select cast(@non_existing_user_var/2 as DECIMAL);
 cast(@non_existing_user_var/2 as DECIMAL)
 NULL
+create table t (d decimal(0,10));
+ERROR 42000: For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column 'd').

mysql-test/t/type_newdecimal.test

@@ -1044,3 +1044,9 @@ drop procedure wg2;
 #
 
 select cast(@non_existing_user_var/2 as DECIMAL);
+
+#
+# Bug #13667 (Inconsistency for decimal(m,d) specification
+#
+--error 1427
+create table t (d decimal(0,10));

sql/sql_parse.cc

@@ -5748,7 +5748,7 @@ new_create_field(THD *thd, char *field_name, enum_field_types type,
   case FIELD_TYPE_NULL:
     break;
   case FIELD_TYPE_NEWDECIMAL:
-    if (!length)
+    if (!length && !new_field->decimals)
       new_field->length= 10;
     if (new_field->length > DECIMAL_MAX_PRECISION)
     {