NPE in flow latency analysis

[lwrage]

Summary
If the model contains a connection that is bound to a bus that occurs in a flow, but the connection is not part of the flow. The analysis tries to add queuing latency for this connection, but there is no latency contributor for it.

Steps To Reproduce

1. Instantiate S.i from the model blow.
2. Select the instance model file and run the flow latency analysis
3. Open the error log
4. See error.

package Issue2912
public
	
	system S
	end S;
	
	system implementation S.i
		subcomponents
			a2: system A.i;
			a1: system A;
			b: bus;
		connections
			c2: port a1.o1 -> a2.i1;
			c1: port a2.o1 -> a1.i1;
		flows
			fl1: end to end flow a1.fsrca -> c2 -> a2.fsnka;
		properties
			Actual_Connection_Binding => (reference(b)) applies to c1, c2;
	end S.i;
	
	system A
		features
			i1: in event data port;
			o1: out event data port;
		flows
			fsrca: flow source o1;
			fsnka: flow sink i1;
	end A;
	
	system implementation A.i
		subcomponents
			b: system B;
		connections
			c2: port b.o1 -> o1;
			c1: port i1 -> b.i1;
		flows
			fsrca: flow source b.fsrcb -> c2 -> o1;
			fsnka: flow sink i1 -> c1 -> b.fsnkb;
	end A.i;
	
	system B
		features
			i1: in event data port;
			o1: out event data port;
		flows
			fsrcb: flow source o1;
			fsnkb: flow sink i1;
	end B;
end Issue2912;

Desktop (please complete the following information):

• OSATE Version: 2.14
• Operating System: macos