Fix Fixes for PE x86_64 for fail in code
Fix Fixes for PE x86_64 for fail in code

Applying 64bit relocs assumes that the CVal is initialized to zero
for the whole 64bit.  Consolidate this a bit, at the same time
zeroing the .ull member more consistently when needed.  Fixes segfault
on x86_64-linux using global vars in tcctest.c.

seyko2/tinycc,leeduhem/tinycc,code4game/tinycc,fstudio/tinycc,mingodad/tinycc,metaeducation/tcc,andreiw/tinycc,mingodad/tinycc,fstudio/tinycc,seyko2/tinycc,code4game/tinycc,leeduhem/tinycc,andrewchambers/tccmirror,andreiw/tinycc,rchandramouli/tinycc,avih/tinycc,metaeducation/tcc,alfonsokim/tinycc,andrewchambers/tccmirror,seyko2/tinycc,leeduhem/tinycc,gfwilliams/tinycc,andreiw/tinycc,andrewchambers/tccmirror,alfonsokim/tinycc,andrewchambers/tccmirror,metaeducation/tcc,leeduhem/tinycc,gfwilliams/tinycc,run4flat/tinycc,gfwilliams/tinycc,andrewchambers/tccmirror,seyko2/tinycc,alfonsokim/tinycc,metaeducation/tcc,mirror/tinycc,mirror/tinycc,seyko2/tinycc,rchandramouli/tinycc,run4flat/tinycc,run4flat/tinycc,fstudio/tinycc,mingodad/tinycc,gfwilliams/tinycc,avih/tinycc,fstudio/tinycc,alfonsokim/tinycc,mingodad/tinycc,leeduhem/tinycc,gfwilliams/tinycc,run4flat/tinycc,alfonsokim/tinycc,rchandramouli/tinycc,fstudio/tinycc,mirror/tinycc,run4flat/tinycc,rchandramouli/tinycc,avih/tinycc,mirror/tinycc,rchandramouli/tinycc,metaeducation/tcc,avih/tinycc,code4game/tinycc