CID 34798: Division or modulo by float zero (DIVIDE_BY_ZERO)

12. divide_by_zero: In expression dist /= count, division by expression
count which may be zero has undefined behavior.

libs/ui/input/kis_zoom_action.cpp

@@ -208,10 +208,12 @@ void KisZoomAction::inputEvent( QEvent* event )
             Q_FOREACH (const QTouchEvent::TouchPoint &point, tevent->touchPoints()) {
                 if (point.state() != Qt::TouchPointReleased) {
                     count++;
-
                     dist += (point.pos() - center).manhattanLength();
                 }
             }
+            if (count == 0) {
+                count = 1;
+            }
 
             dist /= count;
             float delta = qFuzzyCompare(1.0f, 1.0f + d->lastDistance) ? 1.f : dist / d->lastDistance;