for XML the coding name is XER, so the previous check did not like this case....

for XML the coding name is XER, so the previous check did not like this case. type float MyFloat with { encode "XML"; encode "XML"; variant "fractionDigits 2"; variant "XSD:decimal"; };
NOw also works for custom encodings.

Signed-off-by: Kristof Szabados <Kristof.Szabados@ericsson.com>