return build status from build()

jtlc

@@ -52,8 +52,9 @@ def build(args, source, dest):
     contents = f.read()
     f.close()
     result = parser.parse(contents)
-    c = Compiler()
-    c.compile(result, dest)
+    if result is None:
+        return False
+    return Compiler().compile(result, dest)
 
 def do_compile(args, source_fname, ofname):
     Popen(['grep', '-n', '.', source_fname]).wait()