Ignore unwanted CR in option strings (#62)

The SimCoupe.cfg created by older SimCoupe versions used CRLF terminators.
When these were read back in newer versions, std::getline only removed the
system line endings. Under non-Windows plaforms this left an unwanted CR in
the option value.

This lead to strange issues such as the disk image file selector being
blank, because 'inpath' wasn't considered empty due to the CR.

Base/Options.cpp

@@ -156,6 +156,9 @@ bool Load(int argc_, char* argv_[])
     std::ifstream file(path);
     for (std::string line; std::getline(file, line); )
     {
+        if (!line.empty() && line.back() == '\r')
+            line.pop_back();
+
         std::stringstream ss(line);
         std::string key, value;
         if (std::getline(ss, key, '=') && std::getline(ss, value))