fix logic excluding smoke test in metric

app/coffee/CompileManager.coffee

@@ -34,7 +34,7 @@ module.exports = CompileManager =
 				timer = new Metrics.Timer("run-compile")
 				# find the image tag to log it as a metric, e.g. 2015.1 (convert . to - for graphite)
 				tag = request.imageName?.match(/:(.*)/)?[1]?.replace(/\./g,'-') or "default"
-				tag = "other" if project_id?.match(/^[0-9a-f]{24}$/) # exclude smoke test
+				tag = "other" if not request.project_id.match(/^[0-9a-f]{24}$/) # exclude smoke test
 				Metrics.inc("compiles")
 				Metrics.inc("compiles-with-image.#{tag}")
 				LatexRunner.runLatex request.project_id, {