Reordered the CALLBACK and WINAPI directives so that it compiles with
old g++ versions.

diff --git a/include/richedit.h b/include/richedit.h
index a5ce258..1c10cb1 100644
--- a/include/richedit.h
+++ b/include/richedit.h
@@ -57,7 +57,7 @@
 #define EM_GETWORDBREAKPROCEX	(WM_USER + 80)
 #define EM_SETWORDBREAKPROCEX	(WM_USER + 81)
 
-typedef DWORD (CALLBACK* EDITSTREAMCALLBACK)( DWORD, LPBYTE, LONG, LONG * );
+typedef DWORD CALLBACK(* EDITSTREAMCALLBACK)( DWORD, LPBYTE, LONG, LONG * );
 
 typedef struct
 {