Fix error no template named 'raw_ptr'

../fpdfsdk/fpdf_editpage.cpp:171:3: error: no template named 'raw_ptr'
  171 |   raw_ptr<CPDF_PageObject> page_obj;
      |   ^

As far as I understand, `raw_ptr` is only defined when using partition allocator, which we disabled (#28, #124, #137, #148)

Author: bblanchon

patches/hotfixes.patch

@@ -0,0 +1,13 @@
+diff --git a/fpdfsdk/fpdf_editpage.cpp b/fpdfsdk/fpdf_editpage.cpp
+index 76e3e26..f1b7be9 100644
+--- a/fpdfsdk/fpdf_editpage.cpp
++++ b/fpdfsdk/fpdf_editpage.cpp
+@@ -168,7 +168,7 @@ RetainPtr<const CPDF_Object> GetParamObject(void* out_value,
+ 
+ struct ParamsAndObject {
+   RetainPtr<CPDF_Dictionary> params;
+-  raw_ptr<CPDF_PageObject> page_obj;
++  CPDF_PageObject* page_obj;
+ };
+ 
+ ParamsAndObject SetParamValueHelper(FPDF_DOCUMENT document,

steps/03-patch.sh

@@ -17,6 +17,7 @@ pushd "${SOURCE}"
 
 [ "$OS" != "emscripten" ] && apply_patch "$PATCHES/shared_library.patch"
 apply_patch "$PATCHES/public_headers.patch"
+apply_patch "$PATCHES/hotfixes.patch"
 
 [ "$ENABLE_V8" == "true" ] && apply_patch "$PATCHES/v8/pdfium.patch"