patch 8.1.1686: "*" of "*{" is recognized as multipy operator

Problem:    "*" of "*{" is recognized as multipy operator. (Yasuhiro Matsumoto)
Solution:   Check for the "{".
diff --git a/src/eval.c b/src/eval.c
index 20cec16..8c065f2 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -4266,7 +4266,7 @@
     for (;;)
     {
 	op = **arg;
-	if (op != '*' && op != '/' && op != '%')
+	if ((op != '*' || (*arg)[1] == '{') && op != '/' && op != '%')
 	    break;
 
 	if (evaluate)