[gimp] app: fix off-by-0.5 in boundary drawing

[Michael Natterer <mitch src gnome org>]

commit 7ed79e9fe18248ecf3994d13df1eb0afe24b93e6
Author: Michael Natterer <mitch gimp org>
Date:   Sun Sep 26 23:00:23 2010 +0200

    app: fix off-by-0.5 in boundary drawing
    
    which doesn't seem to have any visual effect...

 app/display/gimpdisplayshell-style.c |    1 +
 app/widgets/gimpcairo.c              |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/app/display/gimpdisplayshell-style.c b/app/display/gimpdisplayshell-style.c
index a78633a..d3ee22b 100644
--- a/app/display/gimpdisplayshell-style.c
+++ b/app/display/gimpdisplayshell-style.c
@@ -280,6 +280,7 @@ gimp_display_shell_set_selection_in_style (GimpDisplayShell *shell,
   g_return_if_fail (cr != NULL);
 
   cairo_set_line_width (cr, 1.0);
+  cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
 
   pattern = gimp_cairo_stipple_pattern_create (&selection_in_fg,
                                                &selection_in_bg,
diff --git a/app/widgets/gimpcairo.c b/app/widgets/gimpcairo.c
index e8276e7..c19e57b 100644
--- a/app/widgets/gimpcairo.c
+++ b/app/widgets/gimpcairo.c
@@ -126,12 +126,12 @@ gimp_cairo_add_segments (cairo_t    *cr,
       if (segs[i].x1 == segs[i].x2)
         {
           cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
-          cairo_line_to (cr, segs[i].x2 + 0.5, segs[i].y2 - 1.0);
+          cairo_line_to (cr, segs[i].x2 + 0.5, segs[i].y2 - 0.5);
         }
       else
         {
           cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
-          cairo_line_to (cr, segs[i].x2 - 1.0, segs[i].y2 + 0.5);
+          cairo_line_to (cr, segs[i].x2 - 0.5, segs[i].y2 + 0.5);
         }
     }
 }