Fix crash with carriage returns

Author: aaronfranke

model/off/off_document_4d.cpp

@@ -466,14 +466,18 @@ Ref<OFFDocument4D> OFFDocument4D::_import_load_from_raw_text(const String &p_raw
 	int current_vertex_index = 0;
 	int min_items_per_line = 3;
 	bool can_warn = true;
+	if (p_raw_text.contains("\r")) {
+		WARN_PRINT("OFF import: Warning: OFF file " + p_path + " contains carriage return characters (\\r). Remove them to silence this warning.");
+		can_warn = false;
+	}
 	const PackedStringArray lines = p_raw_text.split("\n", false);
 	for (const String &line : lines) {
 		if (line.is_empty() || line.begins_with("#")) {
 			continue;
 		}
 		if (line.contains("OFF")) {
 			// "OFF" by itself is 3D OFF.
-			if (line != "OFF") {
+			if (line != "OFF" && is_digit(line[0])) {
 				const int declared_dimension = line.to_int();
 				if (declared_dimension < 3) {
 					min_items_per_line = declared_dimension;