Corrected the assumption in the debug information code that an fpos_t can always be assigned zero.
Removed declaration of absolute_name, since it isn't currently used, nor is PATH_MAX guaranteed to be defined on platforms without realpath.
Merge pull request #5 from EmacsUser/master

Cleanup associated with the pull request for the XML debug information format
Re-enable use of realpath() in debugging XML
Further realpath() fixes
Merge branch 'davidk'
Merge branch 'master' into malloctest