Fix out of bounds access when parsing end_pos

Author: BradLewis

core/odin/parser/parser.odin

@@ -99,7 +99,7 @@ end_pos :: proc(tok: tokenizer.Token) -> tokenizer.Pos {
 	pos := tok.pos
 	pos.offset += len(tok.text)
 
-	if tok.kind == .Comment || tok.kind == .String {
+	if (tok.kind == .Comment && len(tok.text) >= 2) || (tok.kind == .String && len(tok.text) >= 1) {
 		if tok.text[:2] == "/*" || tok.text[:1] == "`" {
 			for i := 0; i < len(tok.text); i += 1 {
 				c := tok.text[i]