isrecalcvalid is actually bugged, fix later

src/Steps.h

@@ -180,7 +180,9 @@ class Steps
 	void SetAllMSD(const MinaSD &msd) { stuffnthings = msd; }
 	MinaSD GetAllMSD() const { return stuffnthings;  }
 	map<float, Skillset> SortSkillsetsAtRate(float x, bool includeoverall);
-	bool IsRecalcValid() { return m_StepsType != StepsType_dance_single && !m_Timing.HasWarps(); }
+
+	// this is bugged and returns true for files with negative bpms when it shouldn't - mina
+	bool IsRecalcValid() { GetTimingData()->NegStopAndBPMCheck(); return m_StepsType != StepsType_dance_single && GetTimingData()->HasWarps() && GetTimingData()->ValidSequentialAssumption; }
 
 	// prolly needs an enum or something idk - mina
 	float GetMSD(float x, int i) const;