patched distributed file IO unit tests

Author: TysonRayJones

QuEST/src/QuEST.c

@@ -1435,7 +1435,8 @@ void initDiagonalOpFromPauliHamil(DiagonalOp op, PauliHamil hamil) {
 DiagonalOp createDiagonalOpFromPauliHamilFile(char* fn, QuESTEnv env) {
     PauliHamil h = createPauliHamilFromFile(fn); // validates fn
     validateDiagHamilFromFile(h, __func__);  // destroys h if not diagonal
-    
+    validateNumQubitsInDiagOp(h.numQubits, env.numRanks, __func__);
+
     DiagonalOp op = agnostic_createDiagonalOp(h.numQubits, env);
     agnostic_initDiagonalOpFromPauliHamil(op, h);