Added a ARG_UNUSED macro in utils/magic.h, which
produces a simple cast to void to silence the warnings.
The reasons this is used as opposed to an attribute is
that most compilers should support this.
Besides this, the macro can be easily searched for in
the future to potentially remove (where possible) the
unused parameters.
gaStem.c:225:9: warning: suggest parentheses around assignment used as truth value
gaStem.c:350:9: warning: suggest parentheses around assignment used as truth value
grouteMain.c:363:12: warning: suggest parentheses around assignment used as truth value
grouteMaze.c:573:17: warning: suggest parentheses around assignment used as truth value
groutePath.c:127:13: warning: suggest parentheses around assignment used as truth value
irCommand.c:901:12: warning: suggest parentheses around assignment used as truth value
irCommand.c:999:12: warning: suggest parentheses around assignment used as truth value
irCommand.c:1275:13: warning: suggest parentheses around assignment used as truth value
irCommand.c:1375:13: warning: suggest parentheses around assignment used as truth value
irCommand.c:1931:17: warning: suggest parentheses around assignment used as truth value
rtrDcmpose.c:435:12: warning: suggest parentheses around assignment used as truth value
rtrPin.c:174:17: warning: suggest parentheses around assignment used as truth value
rtrStem.c:373:21: warning: suggest parentheses around assignment used as truth value
rtrStem.c:479:9: warning: suggest parentheses around assignment used as truth value
rtrStem.c:952:17: warning: suggest parentheses around assignment used as truth value
gcrInit.c:239:9: warning: suggest parentheses around assignment used as truth value
net2ir.c:123:13: warning: suggest parentheses around assignment used as truth value
GCC14 -Wall cleanup series [-Wparentheses]