cmQtAutoGenInitializer: Improve const correctness

Source/cmQtAutoGenInitializer.cxx

@@ -1389,7 +1389,7 @@ bool cmQtAutoGenInitializer::InitAutogenTarget()
       for (const cmTarget* t : this->AutogenTarget.DependTargets) {
         std::string depname = t->GetName();
         if (t->IsImported()) {
-          auto ttype = t->GetType();
+          auto const ttype = t->GetType();
           if (ttype == cmStateEnums::TargetType::STATIC_LIBRARY ||
               ttype == cmStateEnums::TargetType::SHARED_LIBRARY ||
               ttype == cmStateEnums::TargetType::UNKNOWN_LIBRARY) {
@@ -1478,7 +1478,7 @@ bool cmQtAutoGenInitializer::InitAutogenTarget()
     }
     if (!useNinjaDepfile) {
       // Add additional autogen target dependencies to autogen target
-      for (cmTarget* depTarget : this->AutogenTarget.DependTargets) {
+      for (cmTarget const* depTarget : this->AutogenTarget.DependTargets) {
         autogenTarget->AddUtility(depTarget->GetName(), false, this->Makefile);
       }
     }
@@ -2002,7 +2002,7 @@ static cmQtAutoGen::IntegerVersion parseMocVersion(std::string str)
   cmQtAutoGen::IntegerVersion result;
 
   static const std::string prelude = "moc ";
-  size_t pos = str.find(prelude);
+  size_t const pos = str.find(prelude);
   if (pos == std::string::npos) {
     return result;
   }
@@ -2120,7 +2120,7 @@ cmQtAutoGenInitializer::GetQtVersion(cmGeneratorTarget const* target,
       res.first = knownQtVersions.at(0);
     } else {
       // Pick a version from the known versions:
-      for (auto it : knownQtVersions) {
+      for (auto const& it : knownQtVersions) {
         if (it.Major == res.second) {
           res.first = it;
           break;