Fix runtime check error on VS2013 in freetype

3rdparty/freetype/freetype.h

@@ -25152,7 +25152,7 @@ FT_END_HEADER
   {
     FT_Error   error;
     FT_Memory  memory;
-    FT_Module  module;
+    FT_Module  module = NULL;
     FT_UInt    nn;
 #define FREETYPE_VER_FIXED  ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \
                                 FREETYPE_MINOR                  )
@@ -107542,8 +107542,8 @@ FT_END_HEADER
     FT_Outline*  outline = NULL;
     FT_BBox      cbox;
     FT_Pos       width, height, pitch;
-    FT_Bitmap*   bitmap;
-    FT_Memory    memory;
+    FT_Bitmap*   bitmap = NULL;
+    FT_Memory    memory = NULL;
     FT_Int       hmul = mode == FT_RENDER_MODE_LCD;
     FT_Int       vmul = mode == FT_RENDER_MODE_LCD_V;
     FT_Pos       x_shift, y_shift, x_left, y_top;