update travis image

diff --git a/.travis.yml b/.travis.yml
index aab29ee..4b2afb9 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: c
 
 sudo: required
-dist: precise
+dist: trusty
 
 compiler: 
   - gcc