Fix Memory access bug for zoom level 19,20

qtvplugin_grid/qtvplugin_grid.cpp

@@ -132,8 +132,8 @@ QWidget * qtvplugin_grid::load_prop_window()
 
 void qtvplugin_grid::cb_paintEvent( QPainter * pImage )
 {
-	int step_level[10] = {20,20,10,10,5,5,2,1,1,1};
-	double dstep_level[10] = {0.5,0.2,0.1,0.05,0.02,0.01,0.005,0.002,0.001,0.0005};
+    int step_level[12] = {20,20,10,10,5,5,2,1,1,1,1,1};
+    double dstep_level[12] = {0.5,0.2,0.1,0.05,0.02,0.01,0.005,0.002,0.001,0.0005,0.0005/2,0.0005/4};
 	if (!m_pVi || m_bVisible==false)
 		return ;
 	QRect rect = m_pVi->windowRect();
@@ -208,7 +208,7 @@ void qtvplugin_grid::cb_paintEvent( QPainter * pImage )
 			if (false==m_pVi->CV_LLA2DP(lat,lon_right,&DP_right,&DP_bottom))
 				continue;
 			pImage->drawLine(DP_left,DP_top,DP_right,DP_bottom);
-			sprintf(str,"%-8.3f",lat);
+            sprintf(str,"%-9.4f",lat);
 			pImage->drawText(DP_left,DP_top-8,str);
 		}
 		for (double lon=int(lon_left*(1/step)-1.5)*step;lon<=int(lon_right*(1/step)+1.5)*step&&m_pVi->level()>0;lon+=step)
@@ -227,7 +227,7 @@ void qtvplugin_grid::cb_paintEvent( QPainter * pImage )
 				dLon+=360;
 			while (dLon>180)
 				dLon-=360;
-			sprintf(str,"%-8.3f",(float)dLon);
+            sprintf(str,"%-9.4f",(float)dLon);
 			pImage->drawText(DP_left,DP_bottom-16,str);
 		}