Getting rid of more (FX_LPCWSTR) casts and fixing two bugs revealed by this.

core/src/fxcrt/fxcrt_platforms.cpp

Index: core/src/fxcrt/fxcrt_platforms.cpp
diff --git a/core/src/fxcrt/fxcrt_platforms.cpp b/core/src/fxcrt/fxcrt_platforms.cpp
index e14e36207948f5cee40aeff019306ecb03cbe698..1c47ee6c9b71f247335668c1c10d0f01a72735be 100644
--- a/core/src/fxcrt/fxcrt_platforms.cpp
+++ b/core/src/fxcrt/fxcrt_platforms.cpp
@@ -56,7 +56,7 @@ FX_BOOL CFXCRT_FileAccess_CRT::Open(FX_WSTR fileName, FX_DWORD dwMode)
     }
     CFX_WideString strMode;
     FXCRT_GetFileModeString(dwMode, strMode);
-    m_hFile = FXSYS_wfopen(fileName.GetPtr(), (FX_LPCWSTR)strMode);
+    m_hFile = FXSYS_wfopen(fileName.GetPtr(), strMode.c_str());
     return m_hFile != NULL;
 }
 void CFXCRT_FileAccess_CRT::Close()