Bug fix in list grammar.

test.c

@@ -116,9 +116,11 @@ void test_results() {
         {"sqrt (100 * 100)", 100},
 
         {"1,2", 2},
+        {"1,2+1", 3},
         {"1,2,3", 3},
         {"(1,2),3", 3},
         {"1,(2,3)", 3},
+        {"-(1,(2,3))", -3},
 
         {"2^2", 4},
         {"pow(2,2)", 4},
@@ -358,6 +360,7 @@ void test_dynamic() {
         {"f+f", 10},
         {"f+test0", 11},
         {"test0+test0", 12},
+        {"test0()+test0", 12},
         {"test1 test0", 12},
         {"test1 f", 10},
         {"test1 x", 4},

tinyexpr.c

@@ -361,7 +361,7 @@ static te_expr *list(state *s) {
 
     while (s->type == TOK_SEP) {
         next_token(s);
-        ret = new_expr(TE_FUNCTION2, ret, term(s));
+        ret = new_expr(TE_FUNCTION2, ret, expr(s));
         ret->f2 = comma;
     }