Added missing CommandLineToArgvW prototype.

diff --git a/include/shellapi.h b/include/shellapi.h
index 03b1b2c..f590906 100644
--- a/include/shellapi.h
+++ b/include/shellapi.h
@@ -245,6 +245,7 @@
  * Misc
  */
 
+LPWSTR*     WINAPI CommandLineToArgvW(LPCWSTR,int*);
 HICON       WINAPI ExtractIconA(HINSTANCE,LPCSTR,UINT);
 HICON       WINAPI ExtractIconW(HINSTANCE,LPCWSTR,UINT);
 #define     ExtractIcon WINELIB_NAME_AW(ExtractIcon)