[gegl] libs/rgbe: Always reset errno before using it

[Martin Nordholts <martinn src gnome org>]

commit 4894f0405081efae7fe9aec60d3b5bad7fd67e69
Author: Martin Nordholts <martinn src gnome org>
Date:   Sat Aug 7 12:57:45 2010 +0200

    libs/rgbe: Always reset errno before using it
    
    Always reset errno before relying on it to ensure success in a
    call. It might have been set by some other call previously, for
    example a g_dgettext() call for a translation file that does not
    exist.

 libs/rgbe/rgbe.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/libs/rgbe/rgbe.c b/libs/rgbe/rgbe.c
index 02e1272..0bdc5b7 100644
--- a/libs/rgbe/rgbe.c
+++ b/libs/rgbe/rgbe.c
@@ -245,9 +245,10 @@ rgbe_header_read_variables (rgbe_file *file,
         {
           gdouble exposure;
 
-          data    += strlen ("EXPOSURE=");
-          exposure = g_ascii_strtod (data, NULL);
+          data += strlen ("EXPOSURE=");
 
+          errno    = 0;
+          exposure = g_ascii_strtod (data, NULL);
           if (errno)
             {
               g_warning ("Invalid value for exposure in radiance image file");
@@ -267,7 +268,10 @@ rgbe_header_read_variables (rgbe_file *file,
 
           for (i = 0; i < RGBE_NUM_RGB; ++i)
             {
-              gdouble multiplier = g_ascii_strtod (data, (gchar**)&data);
+              gdouble multiplier;
+
+              errno = 0;
+              multiplier = g_ascii_strtod (data, (gchar**)&data);
               if (errno)
                 {
                   g_warning ("Invalid value for COLORCORR");
@@ -308,8 +312,9 @@ rgbe_header_read_variables (rgbe_file *file,
           gdouble aspect;
 
           data  += strlen ("PIXASPECT=");
-          aspect = g_ascii_strtod (data, (gchar **)&data);
 
+          errno = 0;
+          aspect = g_ascii_strtod (data, (gchar **)&data);
           if (errno)
             {
               g_warning ("Invalid pixel aspect ratio");
@@ -429,6 +434,7 @@ rgbe_header_read_orientation (rgbe_file *file,
       if (*data++ != ' ')
           goto cleanup;
 
+      errno = 0;
       axis->size = g_ascii_strtoull (data, (gchar **)&data, 0);
       if (errno)
           goto cleanup;