Added missing prototypes for some implemented functions.

diff --git a/include/ras.h b/include/ras.h
index b589e3e..4c58b61 100644
--- a/include/ras.h
+++ b/include/ras.h
@@ -307,6 +307,9 @@
 DWORD WINAPI RasEnumConnectionsA(LPRASCONNA,LPDWORD,LPDWORD);
 DWORD WINAPI RasEnumConnectionsW(LPRASCONNW,LPDWORD,LPDWORD);
 #define      RasEnumConnections WINELIB_NAME_AW(RasEnumConnections)
+DWORD WINAPI RasEnumDevicesA(LPRASDEVINFOA,LPDWORD,LPDWORD);
+DWORD WINAPI RasEnumDevicesW(LPRASDEVINFOW,LPDWORD,LPDWORD);
+#define      RasEnumDevices WINELIB_NAME_AW(RasEnumDevices)
 DWORD WINAPI RasEnumEntriesA(LPCSTR,LPCSTR,LPRASENTRYNAMEA,LPDWORD,LPDWORD);
 DWORD WINAPI RasEnumEntriesW(LPCWSTR,LPCWSTR,LPRASENTRYNAMEW,LPDWORD,LPDWORD);
 #define      RasEnumEntries WINELIB_NAME_AW(RasEnumEntries)