[recipes/inline-editing] Fix an oversight in edit_ingredient

[Matthias Clasen <matthiasc src gnome org>]

commit 5c2548ab7449cef9fe2e1f60e70e689439dffe59
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Apr 25 15:42:15 2017 -0400

    Fix an oversight in edit_ingredient
    
    We should be prepared for the possibility that
    row->amount could be NULL here, and avoid a
    critical warning in that case.

 src/gr-ingredients-viewer-row.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-ingredients-viewer-row.c b/src/gr-ingredients-viewer-row.c
index 1cbe5d6..99d9601 100644
--- a/src/gr-ingredients-viewer-row.c
+++ b/src/gr-ingredients-viewer-row.c
@@ -246,7 +246,7 @@ edit_ingredient (GrIngredientsViewerRow *row)
 {
         g_autofree char *tmp = NULL;
 
-        tmp = g_strconcat (row->amount, " ", row->unit, NULL);
+        tmp = g_strconcat (row->amount ? row->amount : "", " ", row->unit, NULL);
         gtk_entry_set_text (GTK_ENTRY (row->unit_entry), tmp);
         gtk_entry_set_text (GTK_ENTRY (row->ingredient_entry), row->ingredient);