Revert "Equality problem (Ullrich von Bassewitz)".

Revert "Equality problem (Ullrich von Bassewitz)".

Uz classifies his own fix as broken:

http://www.cc65.org/mailarchive/2015-01/11721.html

Although the original issue fixed seemed rather significant looking
back now the regression caused by the (broken) fix seems even more
significant :-(

(reverted from commit 55815ea10cfa3a779b44399f99dd0cf1cb4956f2)

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Equality problem (Ullrich von Bassewitz)

Neil Stockbridge reported a problem with equality comparisons on
cc65.org's mailing list:

http://www.cc65.org/mailarchive/2014-10/11680.html

Uz provided a fix for it:

http://www.cc65.org/mailarchive/2014-10/11683.html

This pull request ask to add the fix to cc65 on github.