Test for dangling pins after symbol is edited

Fixes: lp:1562897
* https://bugs.launchpad.net/kicad/+bug/1562897

eeschema/class_sch_screen.h

@@ -588,6 +588,7 @@ public:
                         enum MARKER_BASE::MARKER_SEVERITY aSeverity );
 
     void UpdateSymbolLinks();
+    void TestDanglingEnds();
 
 private:
     void AddScreenToList( SCH_SCREEN* aScreen );

eeschema/libeditframe.cpp

@@ -1448,6 +1448,7 @@ void LIB_EDIT_FRAME::refreshSchematic()
     SCH_SCREENS schematic;
 
     schematic.UpdateSymbolLinks();
+    schematic.TestDanglingEnds();
 
     // There may be no parent window so use KIWAY message to refresh the schematic editor
     // in case any symbols have changed.

eeschema/sch_screen.cpp

@@ -1522,6 +1522,13 @@ void SCH_SCREENS::UpdateSymbolLinks()
 }
 
 
+void SCH_SCREENS::TestDanglingEnds()
+{
+    for( SCH_SCREEN* screen = GetFirst(); screen; screen = GetNext() )
+        screen->TestDanglingEnds();
+}
+
+
 #if defined(DEBUG)
 void SCH_SCREEN::Show( int nestLevel, std::ostream& os ) const
 {