alib set<Rule> comparsion fix

alib/src/grammar/Rule.cpp

@@ -76,6 +76,7 @@ bool Rule::operator <(const Rule& other) const {
 			return *left < *otherLeft;
 		}
 		left++;
+		otherLeft++;
 	}
 	list<Symbol>::const_iterator right = rightSide.begin();
@@ -85,6 +86,7 @@ bool Rule::operator <(const Rule& other) const {
 			return *right < *otherRight;
 		}
 		right++;
+		otherRight++;
 	}
 	return false;