debug: fix duplicated label of mmm

Author: misho104

phi4.fr

@@ -42,11 +42,11 @@ M$ClassesDescription = {
   S[1] == {
         ClassName -> phi,
         SelfConjugate -> True,
-        Mass -> {mmm, 100},
+        Mass -> {mphi, 100},
         Width -> 0,
         PropagatorLabel -> phi,
         PropagatorType -> S,
-	    PropagatorArrow -> None,
+        PropagatorArrow -> None,
         FullName -> "Scalar"}
 };