Remove empty entries when splitting .obj lines

Some programs would put an additional space after the "v" character,
causing ObjModel to crash the entire game when parsing an .obj file.

Celeste.Mod.mm/Patches/ObjModel.cs

@@ -69,7 +69,7 @@ public static ObjModel CreateFromStream(Stream stream, string fname) {
                 using (StreamReader streamReader = new StreamReader(stream)) {
                     string text;
                     while ((text = streamReader.ReadLine()) != null) {
-                        string[] array = text.Split(' ');
+                        string[] array = text.Split(' ', StringSplitOptions.RemoveEmptyEntries);
                         if (array.Length != 0) {
                             string a = array[0];
                             if (a == "o") {