Fix a typo in xterm.c and w32term.c

* src/xterm.c (x_window_to_scroll_bar):
* src/w32term.c (x_window_to_scroll_bar): Fix a typo.
1 job for master in 49 minutes and 43 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #1177
test-all

00:49:43

 
Name Stage Failure
failed
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
make[2]: *** [check-doit] Error 1
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
make: *** [check-expensive] Error 2
Makefile:962: recipe for target 'check-expensive' failed
ERROR: Job failed: exit code 1