Fix typos in comments

src/sbbs3/ringbuf.c

@@ -203,7 +203,7 @@ DWORD RingBufWrite( RingBuf* rb, const BYTE* src,  DWORD cnt )
 	return cnt;
 }
 
-/* Pass NULL dst to just foward pointer (after Peek) */
+/* Pass NULL dst to just forward pointer (after Peek) */
 DWORD RingBufRead( RingBuf* rb, BYTE* dst,  DWORD cnt )
 {
 	DWORD max, first, remain, len;