[gimp] app: same ERASE mode fix for gimp_edit_clear()

[Michael Natterer <mitch src gnome org>]

commit 0d636a3561950786d11d405c59920abf369cf1e3
Author: Michael Natterer <mitch gimp org>
Date:   Sun May 20 17:32:43 2012 +0200

    app: same ERASE mode fix for gimp_edit_clear()

 app/core/gimp-edit.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/app/core/gimp-edit.c b/app/core/gimp-edit.c
index c1ed1ba..b6b027b 100644
--- a/app/core/gimp-edit.c
+++ b/app/core/gimp-edit.c
@@ -372,7 +372,8 @@ gimp_edit_clear (GimpImage    *image,
                  GimpDrawable *drawable,
                  GimpContext  *context)
 {
-  GimpRGB background;
+  GimpRGB              background;
+  GimpLayerModeEffects paint_mode;
 
   g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
   g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
@@ -381,9 +382,14 @@ gimp_edit_clear (GimpImage    *image,
 
   gimp_context_get_background (context, &background);
 
+  if (gimp_drawable_has_alpha (drawable))
+    paint_mode = GIMP_ERASE_MODE;
+  else
+    paint_mode = GIMP_NORMAL_MODE;
+
   return gimp_edit_fill_full (image, drawable,
                               &background, NULL,
-                              GIMP_OPACITY_OPAQUE, GIMP_ERASE_MODE,
+                              GIMP_OPACITY_OPAQUE, paint_mode,
                               C_("undo-type", "Clear"));
 }