[evolution-ews] Clean up and fix leak in ews_oab_read_upto()

[David Woodhouse <dwmw2 src gnome org>]

commit 7ad9aae781cec80f4e3463030324ea89a2467bac
Author: David Woodhouse <David Woodhouse intel com>
Date:   Mon Jun 10 23:41:31 2013 +0100

    Clean up and fix leak in ews_oab_read_upto()

 src/addressbook/ews-oab-decoder.c |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/src/addressbook/ews-oab-decoder.c b/src/addressbook/ews-oab-decoder.c
index 7727dac..c6c53b5 100644
--- a/src/addressbook/ews-oab-decoder.c
+++ b/src/addressbook/ews-oab-decoder.c
@@ -383,14 +383,16 @@ ews_oab_read_upto (GInputStream *is,
        GString *str;
 
        str = g_string_sized_new (size);
-       do {
+       while (1) {
                gsize len;
                gsize bytes_read;
                gchar *c = g_malloc0 (size);
 
-               g_input_stream_read_all (is, c, size, &bytes_read, cancellable, error);
-               if (*error)
+               if (!g_input_stream_read_all (is, c, size, &bytes_read,
+                                             cancellable, error)) {
+                       g_free (c);
                        break;
+               }
 
                if (bytes_read != size)
                        size = bytes_read;
@@ -399,6 +401,8 @@ ews_oab_read_upto (GInputStream *is,
                if (len)
                        str = g_string_append_len (str, c, len);
 
+               g_free (c);
+
                if (len == 0 || len < size) {
                        goffset seek = (goffset) len + 1 - (goffset) size;
 
@@ -408,8 +412,7 @@ ews_oab_read_upto (GInputStream *is,
                }
 
                size *= 2;
-               g_free (c);
-       } while (!*error);
+       }
 
        return g_string_free (str, FALSE);
 }