conhost: Fix the spelling of a couple of comments.

programs/conhost/conhost.c

@@ -328,7 +328,7 @@ static void init_tty_output( struct console *console )
     console->tty_cursor_visible = TRUE;
 }
 
-/* no longer use relative cursor positionning (legacy API have been used) */
+/* no longer use relative cursor positioning (legacy API have been used) */
 static void enter_absolute_mode( struct console *console )
 {
     console->use_relative_cursor = 0;

programs/conhost/conhost.h

@@ -78,7 +78,7 @@ struct console
     unsigned int           mode;                /* input mode */
     struct screen_buffer  *active;              /* active screen buffer */
     int                    is_unix;             /* UNIX terminal mode */
-    int                    use_relative_cursor; /* use relative cursor positionning */
+    int                    use_relative_cursor; /* use relative cursor positioning */
     int                    no_window;           /* don't create console window */
     INPUT_RECORD          *records;             /* input records */
     unsigned int           record_count;        /* number of input records */