Scanner: Add sensible defaults.

Author: Danny Milosavljevic

lib/Builtins/Scanners/Scanner

@@ -43,10 +43,10 @@ protected:
 	int line_number;
 	int column_number;
 	char* input_name;
-	int backtracking_column_numbers[5]; /* last is dummy */
-	bool backtracking_beginning_of_line[5]; /* last is dummy */
-	bool B_honor_indentation;
-	bool B_beginning_of_line;
+	int backtracking_column_numbers[5] = {0, 0, 0, 0, 0}; /* last is dummy */
+	bool backtracking_beginning_of_line[5] = {false, false, false, false, false}; /* last is dummy */
+	bool B_honor_indentation = true;
+	bool B_beginning_of_line = true;
 	int brace_level; // non-indentation braces.
 	std::list<std::pair<int, int> > open_indentations; // line and column number.
 	void update_indentation();