Open Workspace button is enabled even when there is no workspace

[davemfish]

If the invest run crashes before creating the workspace, then clicking the "Open Workspace" button will crash the Workbench.

This is a rare edge case, but can be reproduced by an error during python imports, for example a ModuleNotFoundError . Or by the case described in #1599

[abhijeetsri13]

include

include

using namespace std;

int main() {

cout << "==============================================" << endl;
cout << "\t      Ranges of Character" << endl;
cout << "==============================================" << endl;
cout << "signed char    : " << CHAR_MIN << " to " << CHAR_MAX << endl;
cout << "unsigned char  : 0 to " << UCHAR_MAX << endl;

for (int i = 0; i <= UCHAR_MAX; i++) {
    cout << "==============================================" << endl;
    char c = 'A';
    cout << "Character : " << c << " ( " << int(c) << " ) " << endl;
    c = char(int(c + 1));
    cout << "Next Character : " << c << " ( " << int(c) << " ) " << endl;
    cout << "==============================================" << endl;
}

return 0;

}