Fix crash from commit f6dafc9.

core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp

Index: core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
diff --git a/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp b/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
index 49ec0bae9202b0275c53be1bdbb3ec43ab0600cb..95415b18d1e6b81e1871467245d937b1997f8bd3 100644
--- a/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
+++ b/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
@@ -1405,7 +1405,7 @@ void CPDF_Creator::InitNewObjNumOffsets() {
       if (!pObj->IsModified()) {
         continue;
       }
-    } else if (m_pParser->IsValidObjectNumber(objnum) &&
+    } else if (m_pParser && m_pParser->IsValidObjectNumber(objnum) &&
                m_pParser->m_V5Type[objnum]) {
       continue;
     }
@@ -1434,7 +1434,7 @@ void CPDF_Creator::InitNewObjNumOffsets() {
   FX_BOOL bNewStart = FALSE;
   for (; i < iCount; i++) {
     FX_DWORD dwCurObjNum = m_NewObjNumArray.ElementAt(i);
-    bool bExist = m_pParser->IsValidObjectNumber(dwCurObjNum) &&
+    bool bExist = m_pParser && m_pParser->IsValidObjectNumber(dwCurObjNum) &&
                   m_ObjectOffset.GetPtrAt(dwCurObjNum);
     if (bExist || dwCurObjNum - dwLastObjNum > 1) {
       if (!bNewStart) {