Reapply "fix memory leak"

This reverts commit c3a5e97d41.

src/PartitionManager.cpp

@@ -25,18 +25,15 @@
 
 namespace PartitionManager {
 
-__attribute__((constructor))
-void init() {
+__attribute__((constructor)) void init() {
   Helper::LoggingProperties::setLogFile("/sdcard/Documents/last_pmt_logs.log");
 }
 
-__attribute__((destructor))
-void cleanup() {
-  delete Variables;
-}
-
 auto Variables = new VariableTable();
 
+void protector::setVariablePtr(basic_variables *&_var) { this->_var = _var; }
+protector::~protector() { delete _var; }
+
 basic_variables::~basic_variables() { delete PartMap; }
 basic_variables::basic_variables()
     : logFile(Helper::LoggingProperties::FILE), onLogical(false),
@@ -52,6 +49,8 @@ int Main(int argc, char **argv) {
   try {
     // try-catch start
     CLI::App AppMain{"Partition Manager Tool"};
+    protector prot;
+    prot.setVariablePtr(Variables);
     FunctionManager FuncManager;
 
     AppMain.fallthrough(true);