KCM KWinScreenEdge fix build issue

Summary: Remove Q_ASSERT() and add a None value to Monitor::Edge enum to convert ElectricBorder NONE or COUNT

Test Plan: Fix kwin build

Reviewers: #kwin, ngraham, zzag

Reviewed By: #kwin, ngraham, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D29104

kcmkwin/kwinscreenedges/kwinscreenedge.cpp

@@ -168,7 +168,7 @@ int KWinScreenEdge::electricBorderToMonitorEdge(ElectricBorder border)
     case ElectricTopLeft:
         return Monitor::TopLeft;
     default: // ELECTRIC_COUNT and ElectricNone
-        Q_ASSERT(false);
+        return Monitor::None;
     }
 }
 

kcmkwin/kwinscreenedges/kwinscreenedge.h

@@ -72,7 +72,7 @@ private:
     virtual bool isSaveNeeded() const;
     virtual bool isDefault() const;
 
-    // internal use, assert if border equals ELECTRIC_COUNT or ElectricNone
+    // internal use, return Monitor::None if border equals ELECTRIC_COUNT or ElectricNone
     static int electricBorderToMonitorEdge(ElectricBorder border);
     static ElectricBorder monitorEdgeToElectricBorder(int edge);
 

kcmkwin/kwinscreenedges/monitor.h

@@ -67,7 +67,8 @@ public:
         TopLeft,
         TopRight,
         BottomLeft,
-        BottomRight
+        BottomRight,
+        None
     };
 Q_SIGNALS:
     void changed();