Re-enable several MSVC warnings

core/fpdftext/fpdf_text_int.cpp

Index: core/fpdftext/fpdf_text_int.cpp
diff --git a/core/fpdftext/fpdf_text_int.cpp b/core/fpdftext/fpdf_text_int.cpp
index 0b237972fb2c8a4d084326651fe58009beb2f5e0..c6de46e7bcf24bf69237bb97494e1d4e9777d7ce 100644
--- a/core/fpdftext/fpdf_text_int.cpp
+++ b/core/fpdftext/fpdf_text_int.cpp
@@ -1803,7 +1803,8 @@ FX_BOOL CPDF_TextPage::IsSameTextObject(CPDF_TextObject* pTextObj1,
   if (nPreCount != nCurCount) {
     return FALSE;
   }
-  CPDF_TextObjectItem itemPer, itemCur;
+  CPDF_TextObjectItem itemPer = {0, 0.0f, 0.0f};

[Tom Sepez, 2016/03/16 18:34:58]

We may want to ping the fx folks here.  Did the intend to make the check at line
1815 with every iteration, or just on the last character? Otherwise, can we add
an early return of true here if nPreCount == 0, and then let the compiler prove
that the loop must be executed?

[Wei Li, 2016/03/17 02:24:05]

Sure, I will have another CL for this.

+  CPDF_TextObjectItem itemCur = {0, 0.0f, 0.0f};
   for (int i = 0; i < nPreCount; i++) {
     pTextObj2->GetItemInfo(i, &itemPer);
     pTextObj1->GetItemInfo(i, &itemCur);