fix resource deps: generate more cleanly - no targets if there are no prereqs. no empty lines.
fix resource copy performance: remove debug
fix filters: behave if someone puts 2 identically named filters into the plugin dir by mistake.
STUPID Unrecognised character set name warning
ERROR_INVALID_MEMBER Label not found error (bof instead of buf)
MAIN_SYNTAX_ERROR_1 STRICT instead of STRUCT - gives "syntax error"
H_SYNTAX_ERROR_1 Syntax error in include file
ERROR_MISSING_STRUCT Leave out a struct definition - gives label not found