[gimp] app: fix tool->progress_cancelable assignment in gimp_tool_progress_start()

[Michael Natterer <mitch src gnome org>]

commit 8d857cea860dfc5148aefebaeb01424b3333fafc
Author: Michael Natterer <mitch gimp org>
Date:   Sun Feb 10 21:22:16 2019 +0100

    app: fix tool->progress_cancelable assignment in gimp_tool_progress_start()
    
    dunno if any of the tool bugs was caused by this, but it was clearly
    broken.

 app/tools/gimptool-progress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/tools/gimptool-progress.c b/app/tools/gimptool-progress.c
index 8e2be4d3f4..beb634ad42 100644
--- a/app/tools/gimptool-progress.c
+++ b/app/tools/gimptool-progress.c
@@ -166,7 +166,7 @@ gimp_tool_progress_start (GimpProgress *progress,
                     G_CALLBACK (gimp_tool_progress_key_press),
                     tool);
 
-  tool->progress_cancelable;
+  tool->progress_cancelable = cancelable;
 
   return progress;
 }