- initialize modelica_string variables to NULL otherwise the debugger…

… breaks searching for the type of un-initialized meta variables

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@24559 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Compiler/Template/CodegenC.tpl

@@ -6262,7 +6262,9 @@ match var
 case var as VARIABLE(parallelism = NON_PARALLEL(__)) then
   let varName = contextCref(var.name,contextFunction,&auxFunction)
   let typ = varType(var)
-  let initVar = match typ case "modelica_metatype" then ' = NULL' else ''
+  let initVar = match typ case "modelica_metatype"
+                          case "modelica_string" then ' = NULL'
+                          else ''
   let &varDecls += if not outStruct then '<%typ%> <%varName%><%initVar%>;<%\n%>' //else ""
   let varName = contextCref(var.name,contextFunction,&auxFunction)
   let &varInits += initRecordMembers(var, &auxFunction)