Fixing .travis.yml

.travis.yml

@@ -56,7 +56,7 @@ script:
   - echo "47" | go run prime.go
   - if [ $(c2go -v | wc -l) -ne 1 ]; then exit 1; fi
   - if [ $(cat prime.go | wc -l) -eq 0 ]; then exit 1; fi
-  - if [ $(c2go ast tests/prime.c | wc -l) -eq 0 ]; then exit 1; fi
+  - if [ $(c2go ast $C2GO/tests/prime.c | wc -l) -eq 0 ]; then exit 1; fi
 
   # Revert the cwd for any cleanup commands.
   - cd -