Revert "Remove FX_Alloc() null checks now that it can't return NULL."

core/src/fpdfapi/fpdf_page/fpdf_page.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
index 5a9f1a8cb8887620b4b85834e998e5a510bbcd80..4ec753d75188b585441b483b46e84795b6787936 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
@@ -204,10 +204,11 @@ void CPDF_TextObject::CopyData(const CPDF_PageObject* pSrc)
     if (m_nChars > 1) {
         m_pCharCodes = FX_Alloc(FX_DWORD, m_nChars);
         m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
-        for (int i = 0; i < m_nChars; i ++) {
+        int i;
+        for (i = 0; i < m_nChars; i ++) {
             m_pCharCodes[i] = pSrcObj->m_pCharCodes[i];
         }
-        for (int i = 0; i < m_nChars - 1; i ++) {
+        for (i = 0; i < m_nChars - 1; i ++) {
             m_pCharPos[i] = pSrcObj->m_pCharPos[i];
         }
     } else {