Code cleanup in wxSVGFileDC.

Consistent white-space usage.
Use wxS macros for strings.
Check if output stream is OK when writing.
Removed unnecessary Borland pragmas.

include/wx/dcsvg.h

@@ -18,11 +18,6 @@
 
 #define wxSVGVersion wxT("v0101")
 
-#ifdef __BORLANDC__
-#pragma warn -8008
-#pragma warn -8066
-#endif
-
 class WXDLLIMPEXP_FWD_BASE wxFileOutputStream;
 
 class WXDLLIMPEXP_FWD_CORE wxSVGFileDC;