coverity#1223093 Uninitialized scalar field

Change-Id: I5519b552507ab81e51f81996835467d353277a18

extensions/source/scanner/grid.cxx

@@ -132,10 +132,20 @@ public:
 GridWindow::GridWindow(Window* pParent)
     : Window(pParent, 0)
     , m_aGridArea(50, 15, 100, 100)
+    , m_fMinX(0.0)
+    , m_fMinY(0.0)
+    , m_fMaxX(0.0)
+    , m_fMaxY(0.0)
+    , m_fChunkX(0.0)
+    , m_fMinChunkX(0.0)
+    , m_fChunkY(0.0)
+    , m_fMinChunkY(0.0)
     , m_pXValues(NULL)
     , m_pOrigYValues(NULL)
     , m_nValues(0)
     , m_pNewYValues(NULL)
+    , m_BmOffX(0)
+    , m_BmOffY(0)
     , m_bCutValues(false)
     , m_aHandles()
     , m_nDragIndex(0xffffffff)