Fix incorrect argument in compiledump.py

Change-Id: Ic597678d2e5ba0c8c8930459da99410f7ae797b4
diff --git a/tools/compiledump.py b/tools/compiledump.py
index d9dd837..192145b 100755
--- a/tools/compiledump.py
+++ b/tools/compiledump.py
@@ -177,7 +177,7 @@
 def read_dump_from_args(args, temp):
   if args.dump is None:
     error("A dump file or directory must be specified")
-  return read_dump(dump, temp, args.override)
+  return read_dump(args.dump, temp, args.override)
 
 def read_dump(dump, temp, override=False):
   if os.path.isdir(dump):