FIX: date! is not listed as a scalar! value

fixes: Oldes/Rebol-issues#2428

Author: Oldes

src/boot/types.reb

@@ -42,7 +42,7 @@ REBOL [
 	pair        self        pair        *        *       *      *   scalar
 	tuple       self        tuple       *        *       *      *   scalar
 	time        self        time        *        *       *      *   scalar
-	date        self        date        *        *       *      *   -
+	date        self        date        *        *       *      *   scalar
 
 	;Series
 	binary      self        string      +        +       *      *   [series]

src/tests/units/typeset-test.r3

@@ -45,6 +45,10 @@ Rebol [
 		;@@ https://github.com/Oldes/Rebol-issues/issues/819
 		--assert typeset? try [make typeset! [number! integer!]]
 
+	--test-- "scalar!"
+		;@@ https://github.com/Oldes/Rebol-issues/issues/2428
+		--assert empty? exclude reduce [integer! decimal! percent! money! char! pair! tuple! time! date!] to-block scalar!
+
 ===end-group===