[gimp] libgimpwidgets: in GimpNumberPairEntry, fix parsing

[N/A <ell src gnome org>]

commit 8d2381f6e737b31f7f1721837b5fb9677279db86
Author: Ell <ell_se yahoo com>
Date:   Tue Feb 27 03:46:46 2018 -0500

    libgimpwidgets: in GimpNumberPairEntry, fix parsing
    
    ... to classify strings beginning with a non-digit character as
    INVALID, rather than CLEAR.

 libgimpwidgets/gimpnumberpairentry.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/libgimpwidgets/gimpnumberpairentry.c b/libgimpwidgets/gimpnumberpairentry.c
index 99f5d70..04ffe0f 100644
--- a/libgimpwidgets/gimpnumberpairentry.c
+++ b/libgimpwidgets/gimpnumberpairentry.c
@@ -1016,11 +1016,19 @@ gimp_number_pair_entry_parse_text (GimpNumberPairEntry *entry,
   gboolean  simplify = FALSE;
   gchar    *end;
 
+  /* skip over whitespace */
+  while (g_unichar_isspace (g_utf8_get_char (text)))
+    text = g_utf8_next_char (text);
+
+  /* check if clear */
+  if (! *text)
+    return PARSE_CLEAR;
+
   /* try to parse a number */
   new_left_number = strtod (text, &end);
 
   if (end == text)
-    return PARSE_CLEAR;
+    return PARSE_INVALID;
   else
     text = end;