Don't save and restore the zero page locations used.
Saves 19 bytes code (in the exe file) and reduces memory footprint
of the program by 45 bytes (code & bss).
Merge pull request #17 from groessler/something_to_pull

Atari targets: Don't save and restore the zero page locations used.
Fixed a logic bug in dbginfo.c module that prevented some valid debug info files from being parsed.
Merge pull request #18 from xofeht/master

dbginfo.c bug fix