Try Coverity fixes that don't break unit tests.

pcbnew/board_commit.cpp

@@ -165,14 +165,12 @@ void BOARD_COMMIT::Push( const wxString& aMessage, int aCommitFlags )
     std::vector<BOARD_ITEM*> bulkRemovedItems;
     std::vector<BOARD_ITEM*> itemsChanged;
 
-    wxCHECK( frame, /* void */ );
-
     if( Empty() )
         return;
 
     if( m_isBoardEditor
-            && !( aCommitFlags & ZONE_FILL_OP )
-            && frame->GetPcbNewSettings()->m_AutoRefillZones )
+      && !( aCommitFlags & ZONE_FILL_OP )
+      && ( frame && frame->GetPcbNewSettings()->m_AutoRefillZones ) )
     {
         autofillZones = true;
 

pcbnew/drc/drc_test_provider_disallow.cpp

@@ -237,8 +237,6 @@ bool DRC_TEST_PROVIDER_DISALLOW::Run()
                     if( zone && zone->GetIsRuleArea() )
                         return true;
 
-                    wxCHECK( pad, false );
-
                     item->ClearFlags( HOLE_PROXY );     // Just in case
 
                     checkDisallow( item );
@@ -247,9 +245,9 @@ bool DRC_TEST_PROVIDER_DISALLOW::Run()
 
                     switch( item->Type() )
                     {
-                    case PCB_VIA_T: hasHole = true;                     break;
-                    case PCB_PAD_T: hasHole = pad->GetDrillSizeX() > 0; break;
-                    default:        hasHole = false;                    break;
+                    case PCB_VIA_T: hasHole = true;                            break;
+                    case PCB_PAD_T: hasHole = pad && pad->GetDrillSizeX() > 0; break;
+                    default:        hasHole = false;                           break;
                     }
 
                     if( hasHole )