Fix a minor compil and Coverity warning

eeschema/tools/sch_drawing_tools.cpp

@@ -75,12 +75,12 @@ SCH_DRAWING_TOOLS::SCH_DRAWING_TOOLS() :
         m_lastStroke( 0, PLOT_DASH_TYPE::DEFAULT, COLOR4D::UNSPECIFIED ),
         m_lastTextboxStroke( 0, PLOT_DASH_TYPE::DEFAULT, COLOR4D::UNSPECIFIED ),
         m_mruPath( wxEmptyString ),
+        m_lastAutoLabelRotateOnPlacement( false ),
         m_inPlaceSymbol( false ),
         m_inDrawShape( false ),
         m_inPlaceImage( false ),
         m_inSingleClickPlace( false ),
         m_inTwoClickPlace( false ),
-        m_lastAutoLabelRotateOnPlacement( false ),
         m_inDrawSheet( false )
 {
 }

pcbnew/tools/pcb_selection_tool.cpp

@@ -2924,7 +2924,7 @@ void PCB_SELECTION_TOOL::GuessSelectionCandidates( GENERAL_COLLECTOR& aCollector
     for( int i = 0; i < aCollector.GetCount(); ++i )
     {
         BOARD_ITEM* item = aCollector[i];
-        double      area;
+        double      area = 0.0;
 
         if( ( item->Type() == PCB_ZONE_T || item->Type() == PCB_FP_ZONE_T )
                 && static_cast<ZONE*>( item )->HitTestForEdge( where, MAX_SLOP * pixel / 2 ) )