Merge pull request #111 from C7-Game/winregfix

Fixes #79 error when winreg key not present

C7/Util.cs

@@ -31,17 +31,18 @@ static public string GetCiv3Path()
 		if (path != null) return path;
 
 		// Look up in Windows registry if present
-		path = Civ3PathFromRegistry("");
-		if (path != "") return path;
+		path = Civ3PathFromRegistry();
+		if (path != null) return path;
 
 		// TODO: Maybe check an array of hard-coded paths during dev time?
 		return "/civ3/path/not/found";
 	}
 
-	static public string Civ3PathFromRegistry(string defaultPath = "D:/Civilization III")
+	static public string Civ3PathFromRegistry()
 	{
 		// Assuming 64-bit platform, get vanilla Civ3 install folder from registry
-		return (string)Microsoft.Win32.Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Infogrames Interactive\Civilization III", "install_path", defaultPath);
+		// Return null if value not present or if key not found
+		return (string)Microsoft.Win32.Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Infogrames Interactive\Civilization III", "install_path", null);
 	}
 
 	// Checks if a file exists ignoring case on the latter parts of its path. If the file is found, returns its full path re-capitalized as