Fix two bugs found by /analyze tool

xfa/fwl/theme/cfwl_formtp.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/theme/cfwl_formtp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
@@ skipping 60 matching lines @@
     SetThemeData(FWL_GetThemeColor(dwThemeID));
   }
   InitCaption(TRUE);
   InitCaption(FALSE);
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID, bChildren);
 }
 FX_BOOL CFWL_FormTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
     return FALSE;
   int32_t iActive = 0;
-  if (pParams->m_dwStates & CFWL_PartState_Inactive) {
+  if (pParams->m_dwStates & CFWL_PartState_Inactive)
     iActive = 1;
-  }
+
   FWLTHEME_STATE eState = FWLTHEME_STATE_Normal;
-  switch (pParams->m_dwStates & 0x03) {
-    case CFWL_PartState_Hovered: {
-      eState = FWLTHEME_STATE_Hover;
-      break;
-    }
-    case CFWL_PartState_Pressed: {
-      eState = FWLTHEME_STATE_Pressed;
-      break;
-    }
-    case CFWL_PartState_Disabled: {
-      eState = FWLTHEME_STATE_Disabale;
-      break;
-    }
-    default: {}
-  }
+  if (pParams->m_dwStates & CFWL_PartState_Hovered)
+    eState = FWLTHEME_STATE_Hover;
+  else if (pParams->m_dwStates & CFWL_PartState_Pressed)
+    eState = FWLTHEME_STATE_Pressed;
+  else if (pParams->m_dwStates & CFWL_PartState_Disabled)
+    eState = FWLTHEME_STATE_Disabale;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawFormBorder(pParams->m_pGraphics, &pParams->m_rtPart, eState,
                      &pParams->m_matrix, iActive);
       break;
     }
     case CFWL_Part::Edge: {
       DrawEdge(pParams->m_pGraphics, pParams->m_pWidget->GetStyles(),
                &pParams->m_rtPart, &pParams->m_matrix);
       break;
@@ skipping 763 matching lines @@
     path.Clear();
     path.AddRectangle(0, 5, 1, 15);
     DrawAxialShading(&gs, 0, 5, 0, 20, m_pThemeData->clrHeadBK[1][1],
                      m_pThemeData->clrHeadBK[1][2], &path);
     path.Clear();
     path.AddRectangle(0, 20, 1, kCYCaption - 19);
     DrawAxialShading(&gs, 0, 20, 0, kCYCaption, m_pThemeData->clrHeadBK[1][2],
                      m_pThemeData->clrHeadBK[1][3], &path);
   }
 }