Fix Symlink throwing error with new method call

This seems to be a mono issue not returning the correct value in some cases. mono/mono.posix#45

Author: austinv900

src/Plugins/Watchers/FSWatcher.cs

@@ -104,7 +104,15 @@ private void LoadWatcherSymlink(string path)
                     }
                 }
 
-                string realPath = str.ToString(0, count);
+                string realPath = str.ToString(0, str.Length);
+
+#if DEBUG
+                if (str.Length != count)
+                {
+                    Interface.Oxide.LogDebug($"Path {path} returned a symlink at {realPath} but wrong length was reported | {count} != {str.Length}");
+                }
+#endif
+
                 string realDirName = Path.GetDirectoryName(realPath);
                 string realFileName = Path.GetFileName(realPath);