m4nfo internal error messages

These are internal error codes and messages which m4nfo might throw during compilation of a m4nfo source file into an nfo file:

Error code	Message
ERR_ALLOCUMASK	Cannot change allocation of user mask
ERR_BYTESIZE	BYTE value >255
ERR_CCLASS	Invalid cargo class parameter in function
ERR_CID255	Value '255' not allowed as a reference ID in functions def() and ref()
ERR_INVALID	Invalid parameter in function
ERR_IOP	Invalid operator in function (function pcalc())
ERR_LABEL	Invalid label parameter in function
ERR_MATCH	Number of substitute building types does not match building's size in function
ERR_NOPARDEF	GRF parameter not defined in function (function pcalc())
ERR_NOSTATCLASS	Missing station class in function definestation()
ERR_NOWEIGHT	Weight required for TE definition
ERR_NUMPAR	Wrong number of parameters in function
ERR_PRICE	Missing function 'enginetype()' before specifying 'price()'
ERR_RANGE	Parameter out of range
ERR_TYPE	Invalid enginetype parameter in function
ERR_UNIT	Invalid unit parameter in function
ERR_VEHID	Invalid veh-ID in function
ERR_WORDSIZE	WORD-size values in block needed by function
ERR_BADSEGMENT	error messages from bridge layout functions
ERR_NUMALLOC
ERR_NUMTYPE