fixed creg length

Author: Kaustuvi

lib/quantum-circuit.js

@@ -9053,7 +9053,11 @@ QuantumCircuit.prototype.exportToAQASM = function(options, isExportPyAQASM, expo
 		aqasm += indent +  "qubits " + numQubits + "\n";
 
 		if (circuit.cregs){
-			aqasm += indent + "cbits " + circuit.cregs.length + "\n";
+			var cregLength = 0;
+			for(var creg in circuit.cregs){
+				cregLength += circuit.cregs[creg].length;
+			}
+			aqasm += indent + "cbits " + cregLength + "\n";
 		}
 	}else {
 		if(exportAsGateName){