[gmime] Fixed compile warnings about comparisons between signed and unsigned variables

[Jeffrey Stedfast <fejj src gnome org>]

commit 9493084ad0f1b2e4235f5a4ebdd6e64009bd1d2b
Author: Jeffrey Stedfast <jeff xamarin com>
Date:   Sat Apr 11 19:10:50 2015 -0400

    Fixed compile warnings about comparisons between signed and unsigned variables

 gmime/gmime-message-partial.c |    2 +-
 gmime/gmime-part-iter.c       |    3 ++-
 gmime/gmime-stream-buffer.c   |    4 ++--
 util/url-scanner.c            |    2 +-
 4 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/gmime/gmime-message-partial.c b/gmime/gmime-message-partial.c
index 0888f9a..165012e 100644
--- a/gmime/gmime-message-partial.c
+++ b/gmime/gmime-message-partial.c
@@ -436,7 +436,7 @@ g_mime_message_partial_split_message (GMimeMessage *message, size_t max_size, si
        len = g_mime_stream_length (stream);
        
        /* optimization */
-       if (len <= max_size) {
+       if (len <= (gint64) max_size) {
                g_object_unref (stream);
                g_object_ref (message);
                
diff --git a/gmime/gmime-part-iter.c b/gmime/gmime-part-iter.c
index b178e0d..09b2ab1 100644
--- a/gmime/gmime-part-iter.c
+++ b/gmime/gmime-part-iter.c
@@ -473,7 +473,8 @@ char *
 g_mime_part_iter_get_path (GMimePartIter *iter)
 {
        GString *path;
-       int i, v;
+       guint i;
+       int v;
        
        if (!g_mime_part_iter_is_valid (iter))
                return NULL;
diff --git a/gmime/gmime-stream-buffer.c b/gmime/gmime-stream-buffer.c
index 2cf275e..20d85ef 100644
--- a/gmime/gmime-stream-buffer.c
+++ b/gmime/gmime-stream-buffer.c
@@ -463,7 +463,7 @@ stream_seek_block_read (GMimeStream *stream, gint64 offset, GMimeSeekWhence when
                return stream->position;
        
        if ((offset < 0 && offset >= (buffer->buffer - buffer->bufptr))
-           || (offset > 0 && offset <= buffer->buflen)) {
+           || (offset > 0 && offset <= (gint64) buffer->buflen)) {
                /* the position is within our pre-buffered region */
                stream->position += offset;
                buffer->bufptr += (size_t) offset;
@@ -539,7 +539,7 @@ stream_seek_cache_read (GMimeStream *stream, gint64 offset, GMimeSeekWhence when
                pos = buffer->bufptr - buffer->buffer;
                
                buflen = (buffer->bufend - buffer->buffer) + len;
-               if (buflen < G_MAXSIZE)
+               if (buflen < (gint64) G_MAXSIZE)
                        buffer->buflen = (size_t) buflen;
                else
                        buffer->buflen = G_MAXSIZE;
diff --git a/util/url-scanner.c b/util/url-scanner.c
index a942801..f6671b2 100644
--- a/util/url-scanner.c
+++ b/util/url-scanner.c
@@ -152,7 +152,7 @@ static struct {
 static gboolean
 is_open_brace (char c)
 {
-       int i;
+       unsigned int i;
        
        for (i = 0; i < G_N_ELEMENTS (url_braces); i++) {
                if (c == url_braces[i].open)