[recipes] Don't be fooled by whitespace

[Matthias Clasen <matthiasc src gnome org>]

commit 8b02085b2a1ef10e363b10f5aff30a1be1233d24
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat May 27 18:49:26 2017 -0400

    Don't be fooled by whitespace
    
    We also don't want to error underline the placeholder
    if the entry contains only whitespace.

 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 1651fbd..5a97f4c 100644
--- a/src/gr-ingredients-viewer-row.c
+++ b/src/gr-ingredients-viewer-row.c
@@ -406,7 +406,7 @@ save_unit (GrIngredientsViewerRow *row)
 
                 text = gtk_entry_get_text (GTK_ENTRY (row->unit_entry));
                 if (!parse_unit (text, &row->amount, &row->unit)) {
-                        if (text && *text)
+                        if (text && text[strspn (text, " ")])
                                 set_unit_error (row, TRUE);
                 }