Valgrind error on Conditional jump or move depends on uninitialised value

This is my code for accepting only integers in my project:

int getInt(
       const char* prompt = nullptr  // User entry prompt
);

Definition:

 int getInt(const char* prompt)
   {
       bool error1, error2;
       int intg;
       char c;
       if (prompt)cout << prompt;
       do
       {
           error1 = false;
           error2 = false;
           cin >> intg;
           error2 = cin.fail();
           cin.get(c);
           error1 = c != '\n';
           if (error2)
           {
               cin.clear();
               clearinput();
               cout << "Bad integer value, try again: ";
           }
           else if (error1)
           {
               cin.clear();
               clearinput();
               cout << "Enter only an integer, try again: ";
           }
       } while (error1 || error2);
       return intg;
   }

I have a default value of "nullptr" for my prompt but still Valgrind showing this error, it is with --track-origins=yes

==161949== Conditional jump or move depends on uninitialised value(s)
==161949==    at 0x402599: sdds::getInt(char const*) (utils.cpp:55)
==161949==    by 0x40116F: getIntTester() (ms1Tester_prof.cpp:35)
==161949==    by 0x401065: main (ms1Tester_prof.cpp:19)
==161949==  Uninitialised value was created by a stack allocation
==161949==    at 0x4024C4: sdds::getInt(char const*) (utils.cpp:49)
==161949==