changed testing order for type inferral

speeds up list operations significantly, especially recursive ones such
as MAP

history.txt

@@ -4027,3 +4027,7 @@ Translation Updates:
 * Objects: draw a "dot" pentrail when moving zero steps while the pen is down
 
 === v4.1.2.5 maintenance release ===
+
+180314
+------
+* Threads: changed testing order for type inferral, speeds up list operations significantly

threads.js

@@ -61,7 +61,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph,
 TableFrameMorph, ColorSlotMorph, isSnapObject*/
 
-modules.threads = '2018-March-09';
+modules.threads = '2018-March-14';
 
 var ThreadManager;
 var Process;
@@ -2545,15 +2545,15 @@ Process.prototype.reportTypeOf = function (thing) {
     if (thing === true || (thing === false)) {
         return 'Boolean';
     }
+    if (thing instanceof List) {
+        return 'list';
+    }
     if (!isNaN(+thing)) {
         return 'number';
     }
     if (isString(thing)) {
         return 'text';
     }
-    if (thing instanceof List) {
-        return 'list';
-    }
     if (thing instanceof SpriteMorph) {
         return 'sprite';
     }