Only write TRAVIS_BUILD_NUMBER when you have it
Only write TRAVIS_BUILD_NUMBER when you have it

newtheatre/history-project,newtheatre/history-project,newtheatre/history-project,johnathan99j/history-project,newtheatre/history-project,johnathan99j/history-project,johnathan99j/history-project,johnathan99j/history-project,newtheatre/history-project,johnathan99j/history-project