[gnome-nibbles] Fix a comment

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 574d0caa0529e119bd93ade34b25f4caf1765a8b
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Feb 16 23:12:17 2016 -0600

    Fix a comment
    
    It's always been GPL

 src/worm.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/worm.vala b/src/worm.vala
index c728401..5a3e5ab 100644
--- a/src/worm.vala
+++ b/src/worm.vala
@@ -16,7 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-// This is a fairly literal translation of the LGPLv2+ original by
+// This is a fairly literal translation of the GPLv2+ original by
 // Sean MacIsaac, Ian Peters, Guillaume Béland.
 
 public enum WormDirection