Declare global variables in init_pegsless_variables procedure
Declare global variables in init_pegsless_variables procedure

is_pegsless, ae, ue, ap, up were not declared global in this procedure.
This caused an error when trying to save a new input file for a newly-
created accelerator.

marenaud/EGSnrc,nrc-cnrc/EGSnrc,MartinMartinov/EGSnrc,marenaud/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,crcrewso/EGSnrc,marenaud/EGSnrc,crcrewso/EGSnrc,nrc-cnrc/EGSnrc,nrc-cnrc/EGSnrc,nrc-cnrc/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,MartinMartinov/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,mchamberland/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,crcrewso/EGSnrc,ftessier/EGSnrc,ftessier/EGSnrc,MartinMartinov/EGSnrc,mchamberland/EGSnrc,ftessier/EGSnrc,marenaud/EGSnrc,marenaud/EGSnrc,ftessier/EGSnrc,marenaud/EGSnrc,nrc-cnrc/EGSnrc