Nullptr safety.

(cherry picked from commit 92b9997948)

common/view/view.cpp

@@ -1081,7 +1081,9 @@ void VIEW::draw( VIEW_ITEM* aItem, bool aImmediate )
         if( it == m_layers.end() )
             continue;
 
-        m_gal->SetLayerDepth( it->second.renderingOrder );
+        if( m_gal )
+            m_gal->SetLayerDepth( it->second.renderingOrder );
+
         draw( aItem, layer, aImmediate );
     }
 }

eeschema/dialogs/dialog_field_properties.cpp

@@ -714,6 +714,6 @@ void DIALOG_FIELD_PROPERTIES::UpdateField( SCH_COMMIT* aCommit, SCH_FIELD* aFiel
         parent->SetFieldsAutoplaced( AUTOPLACE_NONE );
 
     // Update the hierarchy navigator labels if needed.
-    if( needUpdateHierNav )
+    if( editFrame && needUpdateHierNav )
         editFrame->UpdateLabelsHierarchyNavigator();
 }

pcbnew/tools/pcb_picker_tool.cpp

@@ -45,13 +45,17 @@ PCB_PICKER_TOOL::PCB_PICKER_TOOL() :
 bool PCB_PICKER_TOOL::Init()
 {
     PCB_BASE_FRAME*    frame = getEditFrame<PCB_BASE_FRAME>();
-    MAGNETIC_SETTINGS& magneticSettings = *frame->GetMagneticItemsSettings();
+    MAGNETIC_SETTINGS  magneticSettings;
     CONDITIONAL_MENU&  menu = m_menu->GetMenu();
 
-    const auto snapIsSetToAllLayers = [&]( const SELECTION& aSel )
-    {
-        return magneticSettings.allLayers;
-    };
+    if( frame )
+        magneticSettings = *frame->GetMagneticItemsSettings();
+
+    const auto snapIsSetToAllLayers =
+            [&]( const SELECTION& aSel )
+            {
+                return magneticSettings.allLayers;
+            };
 
     // "Cancel" goes at the top of the context menu when a tool is active
     menu.AddItem( ACTIONS::cancelInteractive, SELECTION_CONDITIONS::ShowAlways, 1 );