Handle exceptions in int conversions (#2092)

* RageUtil: Add exception-safe wrappers around std::stoi, stol, stoll

* Replace use of std::stoi with exception-safe StringToInt

src/PlayerOptions.cpp

@@ -607,7 +607,7 @@ bool PlayerOptions::FromOneModString( const RString &sOneMod, RString &sErrorOut
 			{
 				// XXX: We know what they want, is there any reason not to handle it?
 				// Yes. We should be strict in handling the format. -Chris
-				sErrorOut = ssprintf("Invalid player options \"%s\"; did you mean '*%d'?", s.c_str(), std::stoi(s) );
+				sErrorOut = ssprintf("Invalid player options \"%s\"; did you mean '*%d'?", s.c_str(), StringToInt(s) );
 				return false;
 			}
 			else