Now that every use of the LA_EMIT_CHAR macro is within a language_defn
member function we can simply call the emitchar member function
directly instead of using the LA_EMIT_CHAR macro.
If we are ever inside a language object, for example, cplus_language,
while current_language points at something other than cplus_language
then this commit will result in a change in behaviour. However, I
believe if we did have such a difference then this would be a bug in
GDB. AS such I'm going to claim there _should_ be no user visible
changes from this commit.