gfx_sort1D: out of matrix bounds set

[vifino]

While running sort1D as the only effect, I've found that it fails an assertion.
This manifests on a real matrix as a cut off screen.

This happens with every* run of algo 16, merge_sort_inplace, any draw/highlight style combination.

>> Now drawing sort1D (algo 16, draw style 0)...................................
................................................................................
.....................................Assertion failed: x < matx (src/modules/out_sdl2.c: set: 93)

[empirephoenix]

Getting a similar error in the same module, but on y axis

Now drawing sort1D.............................................................................................................sled: src/modules/out_udp2.c:128: set: Assertion `y < Y_SIZE' failed.
[1] 21155 abort (core dumped) ./sled -o udp2:192.168.4.1:10000,25
./sled -o udp2:192.168.4.1:10000,25 77.01s user 82.35s system 1% cpu 2:16:33.41 total