Make converstion explicit from CFX_ByteString to uint8_t*

fpdfsdk/fpdf_flatten.cpp

Index: fpdfsdk/fpdf_flatten.cpp
diff --git a/fpdfsdk/fpdf_flatten.cpp b/fpdfsdk/fpdf_flatten.cpp
index 99f97d7ca2c572e4fde9b9bdc2f8af318a570d3d..54e606397fb7c9400f5d1cd6173a41aacad4e2b5 100644
--- a/fpdfsdk/fpdf_flatten.cpp
+++ b/fpdfsdk/fpdf_flatten.cpp
@@ -201,7 +201,7 @@ void SetPageContents(CFX_ByteString key,
 
       CFX_ByteString sStream;
       sStream.Format("q 1 0 0 1 0 0 cm /%s Do Q", key.c_str());
-      pNewContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
+      pNewContents->SetData(sStream.raw_str(), sStream.GetLength(), FALSE,
                             FALSE);
     }
     return;
@@ -220,8 +220,7 @@ void SetPageContents(CFX_ByteString key,
       CFX_ByteString sBody =
           CFX_ByteString((const FX_CHAR*)acc.GetData(), acc.GetSize());
       sStream = sStream + sBody + "\nQ";
-      pContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
-                         FALSE);
+      pContents->SetData(sStream.raw_str(), sStream.GetLength(), FALSE, FALSE);
       pContentsArray->AddReference(pDocument, dwObjNum);
       break;
     }
@@ -247,8 +246,7 @@ void SetPageContents(CFX_ByteString key,
 
     CFX_ByteString sStream;
     sStream.Format("q 1 0 0 1 0 0 cm /%s Do Q", key.c_str());
-    pNewContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
-                          FALSE);
+    pNewContents->SetData(sStream.raw_str(), sStream.GetLength(), FALSE, FALSE);
   }
 }
 
@@ -508,9 +506,7 @@ DLLEXPORT int STDCALL FPDFPage_Flatten(FPDF_PAGE page, int nFlag) {
     sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f,
                  sFormName.c_str());
     sStream += sTemp;
-
-    pNewXObject->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
-                         FALSE);
+    pNewXObject->SetData(sStream.raw_str(), sStream.GetLength(), FALSE, FALSE);
   }
   pPageDict->RemoveAt("Annots");