Subj : src/conio/bitmap_con.c cterm.c
To   : Git commit to main/sbbs/master
From : Deucе
Date : Thu Feb 08 2024 23:07:40

https://gitlab.synchro.net/main/sbbs/-/commit/3dfa12a6cacf3f1289f8c66c
Modified Files:
	src/conio/bitmap_con.c cterm.c
Log Message:
Fix crash found by vttest.

If DL was passed a parameter equal to or greater than the number of
lines from the current line to the last line in the region, it would
try to move a negative-sized box up, which resulted in a crash.

This fixes that three ways:
1) Do not allow moving boxes with negative X/Y sizes
2) In dellines, clamp the lines to the number that could be deleted
3) Don't move lines up of all rest of the lines are being deleted
--- SBBSecho 3.20-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

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