Add "f" suffix to literals of type float

...to avoid

> error CS0266: Cannot implicitly convert type 'double' to 'float'. An explicit conversion exists (are you missing a cast?)

(as would e.g. happen if offapi/org/libreoffice/embindtest/Constants.idl were
included in regular builds)

Change-Id: I6a4d8b151755edd3a8b03d73e2bb546cf1d19e7d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/174200
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>

codemaker/source/netmaker/netproduce.cxx

@@ -881,7 +881,7 @@ void NetProducer::produceConstantGroup(std::string_view name,
                 break;
             case unoidl::ConstantValue::TYPE_FLOAT:
                 type = "float"_ostr;
-                value = OString::number(member.value.floatValue);
+                value = OString::number(member.value.floatValue) + "f";
                 break;
             case unoidl::ConstantValue::TYPE_DOUBLE:
                 type = "double"_ostr;