Added guard for func being undefined

Author: fiznool

lib/jasmine-node/jasmine/boot.js

@@ -64,7 +64,7 @@
           return spec.doneFunc();
         }
       };
-      if (func.length > 0) {
+      if (func != null ? func.length : void 0) {
         wrappedFunc = function(done) {
           spec.doneFunc = done;
           func.call(this, wrappedDone);

src/jasmine/boot.coffee

@@ -53,7 +53,7 @@ boot = (jasmineRequire, clockCallback) ->
                 return spec.doneFunc()
             return
 
-        if func.length > 0
+        if func?.length
             wrappedFunc = (done) ->
                 spec.doneFunc = done
                 func.call(@, wrappedDone)