logic error introduced in df2d3cd25 ok stsp@

Fixes the following error during gotadmin pack -a: gotadmin: raw object has unexpected size

ok jamsek

ok op, jamsek

Add the TAB instruction to the test harness, and a test case for the previous commit: scroll down the log from the diff view with the J keymap when on the last loaded commit. ok stsp@

We call resize_log_view() when toggling 'F'ullscreen from the log view, but forgot to do this when toggling fullscreen from a child view if its parent is the log view. This fixes a bug that prevents scrolling down the log view from the diff view with the J keymap if already on the last loaded commit. Regress test in the following commit. ok stsp@

On i386 view_split_begin_y() computed a value slightly different than on other arches, breaking the regress. Casting HSPLIT_SCALE as float unbreaks it. Diff from jamsek, committing on his behalf. Thanks!

we can't open arbitrary files after unveil(), and that's a feature! So, open it early and truncate it before use just in case screendump() ends up being called more than once. ok/tweak stsp, ok jamsek

ok stsp, jamsek

as it might not be there (for e.g. if ran under cron). Reuse instead /dev/null since it's not expected to get input from stdin. ok jamsek