[gtkmm/wip/dboles/make_managed-4: 1/2] gtk-demo/demowindow: Avoid compiler warning by g++

[Daniel Boles <dboles src gnome org>]

commit d19912063c0531c2d0b8310608fba114ab1667ed
Author: Daniel Boles <dboles src gmail com>
Date:   Sun Oct 7 15:35:13 2018 +0100

    gtk-demo/demowindow: Avoid compiler warning by g++
    
    Flip the if/else case so that the /* Fall through */ comment comes
    before the next case label, which suppresses a warning from
    -Wimplicit-fallthrough and looks clearer anyway.

 demos/gtk-demo/demowindow.cc | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)
---
diff --git a/demos/gtk-demo/demowindow.cc b/demos/gtk-demo/demowindow.cc
index d7e99ae0..3c02f36d 100644
--- a/demos/gtk-demo/demowindow.cc
+++ b/demos/gtk-demo/demowindow.cc
@@ -361,20 +361,13 @@ void DemoWindow::load_file(const std::string& filename)
          while (isspace (*p))
            p++;
 
-          if (*p)
-          {
-            p = lines[i];
-            state++;
-            /* Fall through */
-            // TODO: Replace with [[fallthrough]] annotation (to case 3)
-            // when we ue C++17.
-            /* Reading program body */
-            start = refBufferSource->insert(start, p);
-            start = refBufferSource->insert(start, "\n");
+          if (!*p)
             break;
-          }
-         else
-           break;
+
+          p = lines[i];
+          state++;
+          /* Fall through */
+          // TODO: Replace with [[fallthrough]] annotation once we use C++17
 
        case 3:
          /* Reading program body */