Debugging macros

Something to c

I've put together a set of macros to make debugging easier. One day I'll learn how to use external debugging software, but until then...

trace_mac.h

These macros print their messages when the global tk_debug > level.

PING(level)	Prints "PING file.line\n".
MSG(level,...)	Prints the message ... .
DUMP(level,a,fmt)	Dumps a variable a with a given format fmt.