Avoid using "." for the current directory.

All supported platforms support leaving out "./" (or ".\") in front
of paths to indicate the current directory. However, not all
platforms support using "." to indicate the current directory.

Modified the code to avoid constructing paths with "./" or ".\"
when no directory component needs to be prepended to a path.

redalert/conquer.cpp

@@ -3876,14 +3876,15 @@ static bool Change_Local_Dir(int cd)
 {
  static bool _initialised = false;
  static unsigned _detected = 0;
- static const char* _vol_labels[CD_COUNT] = {"allied", "soviet", "counterstrike", "aftermath", "."};
+ static const char* _vol_labels[CD_COUNT] = {"allied", "soviet", "counterstrike", "aftermath", ""};
  std::string paths[3] = {Paths.User_Path(), Paths.Data_Path(), Paths.Program_Path()};
 
  // Detect which if any of the discs have had their data copied to an appropriate local folder.
  if (!_initialised) {
  for (int i = 0; i < CD_COUNT; ++i) {
  for (int j = 0; j < 3; ++j) {
- std::string path = Paths.Concatenate_Paths(paths[j].c_str(), _vol_labels[i]);
+ std::string path =
+ _vol_labels[i] ? Paths.Concatenate_Paths(paths[j].c_str(), _vol_labels[i]) : paths[j];
  RawFileClass vol(path.c_str());
 
  if (vol.Is_Directory()) {

tiberiandawn/conquer.cpp

@@ -3507,14 +3507,15 @@ static bool Change_Local_Dir(int cd)
 {
  static bool _initialised = false;
  static unsigned _detected = 0;
- static const char* _vol_labels[CD_COUNT] = {"gdi", "nod", "covertops", "."};
+ static const char* _vol_labels[CD_COUNT] = {"gdi", "nod", "covertops", ""};
  std::string paths[3] = {Paths.User_Path(), Paths.Data_Path(), Paths.Program_Path()};
 
  // Detect which if any of the discs have had their data copied to an appropriate local folder.
  if (!_initialised) {
  for (int i = 0; i < CD_COUNT; ++i) {
  for (int j = 0; j < 3; ++j) {
- std::string path = Paths.Concatenate_Paths(paths[j].c_str(), _vol_labels[i]);
+ std::string path =
+ _vol_labels[i] ? Paths.Concatenate_Paths(paths[j].c_str(), _vol_labels[i]) : paths[j];
  RawFileClass vol(path.c_str());
 
  if (vol.Is_Directory()) {