[recipes] Skip non-ascii whitespace too

[Matthias Clasen <matthiasc src gnome org>]

commit 006efc0d4f6a8dff68a88682bd31765f781bc419
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 2 14:16:43 2017 -0500

    Skip non-ascii whitespace too
    
    This was showing up as a failure to parse mixed numbers that
    we've formatted ourselves (!), because we use a thin space there.

 src/gr-utils.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gr-utils.c b/src/gr-utils.c
index 2c0cd5d..f4ef27f 100644
--- a/src/gr-utils.c
+++ b/src/gr-utils.c
@@ -294,8 +294,8 @@ skip_whitespace (char **input)
 {
         char *in = *input;
 
-        while (*input && g_ascii_isspace (**input)) {
-                *input += 1;
+        while (*input && g_unichar_isspace (g_utf8_get_char (*input))) {
+                *input = g_utf8_next_char (*input);
         }
 
         return in != *input;