fix writing out of bounds (fixes #198)

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - new tags were not picked up in revlog view ([#190](https://github.com/extrawurst/gitui/issues/190))
 - tags not shown in commit details popup ([#193](https://github.com/extrawurst/gitui/issues/193))
 - min size for relative popups on small terminals ([#179](https://github.com/extrawurst/gitui/issues/179))
+- fix crash on resizing terminal to very small width ([#198](https://github.com/extrawurst/gitui/issues/198))
 
 ## [0.8.1] - 2020-07-07
 

src/cmdbar.rs

@@ -157,7 +157,7 @@ impl CommandBar {
             let r = Rect::new(
                 r.width.saturating_sub(MORE_WIDTH),
                 r.y + r.height.saturating_sub(1),
-                MORE_WIDTH,
+                MORE_WIDTH.min(r.width),
                 1,
             );