osc: verify OSC 4/104 color index is valid

Closes #434
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Daniel Eklöf 2021-04-05 21:06:48 +02:00
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commit 4aae54e3e7
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@ -71,6 +71,9 @@
when output scaling was enabled
(https://codeberg.org/dnkl/foot/issues/409).
* Empty sixels resulted in non-empty images.
* OSC-4/104 out-of-bounds accesses to the color table. This was the
reason pywal turned foot windows transparent
(https://codeberg.org/dnkl/foot/issues/434).
## 1.7.0