emacs-28 00236cc: Fix the enumeration values returned by 'try_scrolling'

[Eli Zaretskii]

branch: emacs-28
commit 00236cc802a22555ad0299546a48420cbfbaaed5
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix the enumeration values returned by 'try_scrolling'
    
    * src/xdisp.c (try_scrolling): Make the enum values match the
    commentary.  Reported by Po Lu <luangruo@yahoo.com>.
---
 src/xdisp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index 4642541..527a79b 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -17422,9 +17422,9 @@ cursor_row_fully_visible_p (struct window *w, bool 
force_p,
 
 enum
 {
-  SCROLLING_SUCCESS,
-  SCROLLING_FAILED,
-  SCROLLING_NEED_LARGER_MATRICES
+  SCROLLING_SUCCESS = 1,
+  SCROLLING_FAILED = 0,
+  SCROLLING_NEED_LARGER_MATRICES = -1
 };
 
 /* If scroll-conservatively is more than this, never recenter.