a68: fix uninitialized memory in get_hole_symbol [PR algol68/124115]

a68: fix uninitialized memory in get_hole_symbol [PR algol68/124115]

The function get_hole_symbol is supposed to set *addrp to either true
or false.  However it was only setting it to false, causing
uninitialized memory.

This patch also removes a gcc_asser tfrom a68_make_formal_hole_decl.
If the formal hole results in an empty symbol then it may result into
invalid assembly being generated, but that is akin to use an invalid
asm template.

Signed-off-by: Jose E. Marchesi <jemarch@gnu.org>
gcc/algol68/ChangeLog

	PR algol68/124115
	* a68-low-holes.cc (get_hole_symbol): Always set *addrp to avoid
	uninitialized memory.
	* a68-low.cc (a68_make_formal_hole_decl): Remove assert.

gcc/testsuite/ChangeLog

	PR algol68/124115
	* algol68/compile/formal-hole-2.a68: New test.