Code change to avoid signed/unsigned mismatch warnings

core/fpdfapi/fpdf_font/font_int.h

Index: core/fpdfapi/fpdf_font/font_int.h
diff --git a/core/fpdfapi/fpdf_font/font_int.h b/core/fpdfapi/fpdf_font/font_int.h
index 3ee4068d7ded4d055927c8e0560c7c203072c9c9..fc69b0cbd9b81a2e690dfadcfee5a834d8c16a55 100644
--- a/core/fpdfapi/fpdf_font/font_int.h
+++ b/core/fpdfapi/fpdf_font/font_int.h
@@ -48,8 +48,8 @@ class CFX_StockFontArray {
   ~CFX_StockFontArray();
 
   // Takes ownership of |pFont|.
-  void SetFont(int index, CPDF_Font* pFont);
-  CPDF_Font* GetFont(int index) const;
+  void SetFont(uint32_t index, CPDF_Font* pFont);
+  CPDF_Font* GetFont(uint32_t index) const;
 
  private:
   std::unique_ptr<CPDF_Font> m_StockFonts[14];
@@ -61,19 +61,19 @@ class CPDF_FontGlobals {
   ~CPDF_FontGlobals();
 
   void Clear(CPDF_Document* pDoc);
-  CPDF_Font* Find(CPDF_Document* pDoc, int index);
+  CPDF_Font* Find(CPDF_Document* pDoc, uint32_t index);
 
   // Takes ownership of |pFont|.
-  void Set(CPDF_Document* key, int index, CPDF_Font* pFont);
+  void Set(CPDF_Document* key, uint32_t index, CPDF_Font* pFont);
 
   CPDF_CMapManager m_CMapManager;
   struct {
     const struct FXCMAP_CMap* m_pMapList;
-    int m_Count;
+    uint32_t m_Count;
   } m_EmbeddedCharsets[CIDSET_NUM_SETS];
   struct {
     const uint16_t* m_pMap;
-    int m_Count;
+    uint32_t m_Count;
   } m_EmbeddedToUnicodes[CIDSET_NUM_SETS];
 
  private: