Don't allow NULL as an argument to block_using
authorTom Tromey <tom@tromey.com>
Fri, 20 Jan 2023 00:13:22 +0000 (17:13 -0700)
committerTom Tromey <tom@tromey.com>
Sun, 19 Feb 2023 19:51:05 +0000 (12:51 -0700)
commit392c1cbd745a575c5894ea33876f255b66a14d89
tree161676a34fd795aeed38d1ebc2758fb891b9e5d2
parent683aecac8c37c11d63203c96455a3d9ecf50bbe9
Don't allow NULL as an argument to block_using

block_using has special behavior when the block is NULL.
Remove this.  No caller seems to be affected.
gdb/block.c