Only dump clocked partitions if there are some (#14662)

Author: phannebohm

OMCompiler/Compiler/BackEnd/SynchronousFeatures.mo

@@ -165,11 +165,13 @@ algorithm
   systs := listAppend(contSysts, clockedSysts);
   outDAE := BackendDAE.DAE(systs, shared);
 
-  if Flags.isSet(Flags.DUMP_SYNCHRONOUS) then
-    print("synchronous features pre-phase: synchronousFeatures\n\n");
-    BackendDump.dumpEqSystems(systs, "clock partitioning");
-    BackendDump.dumpBasePartitions(shared.partitionsInfo.basePartitions, "Base clocks");
-    BackendDump.dumpSubPartitions(shared.partitionsInfo.subPartitions, "Sub clocks");
+  if not listEmpty(clockedSysts) then
+    if Flags.isSet(Flags.DUMP_SYNCHRONOUS) then
+      print("synchronous features pre-phase: synchronousFeatures\n\n");
+      BackendDump.dumpEqSystems(systs, "clock partitioning");
+      BackendDump.dumpBasePartitions(shared.partitionsInfo.basePartitions, "Base clocks");
+      BackendDump.dumpSubPartitions(shared.partitionsInfo.subPartitions, "Sub clocks");
+    end if;
   end if;
 end clockPartitioning1;