fix for enum and set field type to column type conversion

Author: jennifersp

fields.go

@@ -77,6 +77,11 @@ func (mf *mysqlField) typeDatabaseName() string{
  }
 return"SMALLINT"
 casefieldTypeString:
+ifmf.flags&flagEnum!=0{
+return"ENUM"
+ } elseifmf.flags&flagSet!=0{
+return"SET"
+ }
 ifmf.charSet==binaryCollationID{
 return"BINARY"
  }