Add missing operators for CFX_ByteStringC.

core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
index f79fcda0a0028fa62d1f3bd6e890ec2e9b385309..e098f66dec7d96f77ef42820a5da1ce5fcb02dd4 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
@@ -427,7 +427,7 @@ void CPDF_GeneralStateData::SetBlendMode(FX_BSTR blend_mode)
     if (blend_mode.GetLength() > 15) {
         return;
     }
-    FXSYS_memcpy32(m_BlendMode, (FX_LPCBYTE)blend_mode, blend_mode.GetLength());
+    FXSYS_memcpy32(m_BlendMode, blend_mode.GetPtr(), blend_mode.GetLength());

[brucedawson, 2015/04/22 10:36:08]

Consider instead adding and then using a c_str() function so that the usage
matches that of std::string (just a thought).

[Tom Sepez, 2015/04/22 16:54:19]

Yep.  The CFX_xxxStringC types have an existing GetPtr().  The CFX_xxxString
types didn't, so we added it, and we picked the name, which is why it's called
c_str(). I'll Follow-up someday.

     m_BlendMode[blend_mode.GetLength()] = 0;
     m_BlendType = ::GetBlendType(blend_mode);
 }