Constify WMMatchDataProc and fix fallout
It addresses this warning
dialog.c: In function ‘LoadHistory’:
dialog.c:209: warning: passing argument 2 of ‘WMFindInArray’ from incompatible pointer type
../WINGs/WINGs/WUtil.h:455: note: expected ‘int (*)(void *, void *)’ but argument is of type ‘int (*)(const void *, const void *)’
but induces others in other places. One of them was this one
window.c: In function ‘wManageWindow’:
window.c:782: warning: passing argument 2 of ‘WMFindInArray’ from incompatible pointer type
../WINGs/WINGs/WUtil.h:455: note: expected ‘int (*)(const void *, const void *)’ but argument is of type ‘int (*)(void *, void *)’
which is fixed by constifying the arguments of matchIdentifier(). The other warnings are
fixed similarly.