Coverity fixes.

common/eda_draw_frame.cpp

@@ -879,7 +879,17 @@ void EDA_DRAW_FRAME::FocusOnLocation( const wxPoint& aPos )
     }
 
     if( centerView )
-        GetCanvas()->GetView()->SetCenter( aPos, dialogScreenRects );
+    {
+        try
+        {
+            GetCanvas()->GetView()->SetCenter( aPos, dialogScreenRects );
+        }
+        catch( const ClipperLib::clipperException& exc )
+        {
+            wxLogError( wxT( "Clipper library error '%s' occurred centering object." ),
+                        exc.what() );
+        }
+    }
 
     GetCanvas()->GetViewControls()->SetCrossHairCursorPosition( aPos );
 }

eeschema/lib_shape.cpp

@@ -115,8 +115,8 @@ void LIB_SHAPE::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     wxPoint start = aTransform.TransformCoordinate( m_start ) + aOffset;
     wxPoint end = aTransform.TransformCoordinate( m_end ) + aOffset;
     wxPoint center;
-    int     startAngle;
-    int     endAngle;
+    int     startAngle = 0;
+    int     endAngle = 0;
     int     pen_size = GetEffectivePenWidth( aPlotter->RenderSettings() );
     FILL_T fill = aFill ? m_fill : FILL_T::NO_FILL;