[cogl] mingw-fetch-dependencies.sh: Don't pass -c to wget

[Neil Roberts <nroberts src gnome org>]

commit c2721664aac000588e0a20b0bb1f8e896b18eddc
Author: Neil Roberts <neil linux intel com>
Date:   Wed Sep 21 11:54:51 2011 +0100

    mingw-fetch-dependencies.sh: Don't pass -c to wget
    
    The -c option for wget and -C - option to curl are used to make it
    continue the download if the file already exists. The idea was that it
    wouldn't waste time downloading the files again if the file already
    exists. However this causes problems if the remote file gets larger
    because the download will continue from the size of the old file so it
    will get corrupt. Instead let's just explicitly check if the file
    already exists and avoid calling wget or curl altogether.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 build/mingw/mingw-fetch-dependencies.sh |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/build/mingw/mingw-fetch-dependencies.sh b/build/mingw/mingw-fetch-dependencies.sh
index f408348..54028b3 100755
--- a/build/mingw/mingw-fetch-dependencies.sh
+++ b/build/mingw/mingw-fetch-dependencies.sh
@@ -33,12 +33,17 @@ function download_file ()
     local url="$1"; shift;
     local filename="$1"; shift;
 
+    if test -f "$DOWNLOAD_DIR/$filename"; then
+        echo "Skipping download of $filename because the file already exists";
+        return 0;
+    fi;
+
     case "$DOWNLOAD_PROG" in
 	curl)
-	    curl -C - -o "$DOWNLOAD_DIR/$filename" "$url";
+	    curl -o "$DOWNLOAD_DIR/$filename" "$url";
 	    ;;
 	*)
-	    $DOWNLOAD_PROG -O "$DOWNLOAD_DIR/$filename" -c "$url";
+	    $DOWNLOAD_PROG -O "$DOWNLOAD_DIR/$filename" "$url";
 	    ;;
     esac;