Fix leaks in CFieldTree::Node.

core/fpdfdoc/cpdf_interform.cpp

Index: core/fpdfdoc/cpdf_interform.cpp
diff --git a/core/fpdfdoc/cpdf_interform.cpp b/core/fpdfdoc/cpdf_interform.cpp
index d2a842262eabafe645a9735a20c12128c2040fb3..13d743cb52182cd0090c7fccaeb35a093968b03e 100644
--- a/core/fpdfdoc/cpdf_interform.cpp
+++ b/core/fpdfdoc/cpdf_interform.cpp
@@ -428,7 +428,6 @@ class CFieldTree {
           return m_pField;
 
         --*pFieldsToGo;
-        return nullptr;
       }
       for (size_t i = 0; i < GetChildrenCount(); ++i) {
         CPDF_FormField* pField = GetChildAt(i)->GetFieldInternal(pFieldsToGo);
@@ -441,10 +440,11 @@ class CFieldTree {
     size_t CountFieldsInternal(int nLevel) const {
       if (nLevel > nMaxRecursion)
         return 0;
-      if (m_pField)
-        return 1;
 
       size_t count = 0;
+      if (m_pField)
+        ++count;
+
       for (size_t i = 0; i < GetChildrenCount(); ++i)
         count += GetChildAt(i)->CountFieldsInternal(nLevel + 1);
       return count;