Don't crash when changing the autosave interval.

CHANGELOG.md

@@ -17,6 +17,7 @@ Other new features:
 Bug fixes:
   * Do not remove autosaves after successfully opening a file, preventing
     data loss in case of two abnormal terminations in a row.
+  * Do not crash when changing autosave interval.
   * Three.js: correctly respond to controls when browser zoom is used.
   * OS X: do not completely hide main window when defocused.
 

src/confscreen.cpp

@@ -453,6 +453,7 @@ bool TextWindow::EditControlDoneForConfiguration(const char *s) {
             } else {
                 Error("Bad format: specify interval in integral minutes");
             }
+            break;
         }
 
         default: return false;