typo fix

applications/welcome/views/generic.jsonp

@@ -7,7 +7,7 @@
 # it is not safe to use as a generic.jsonp because of security implications.
 
 if response.view == 'generic.jsonp':
-   raise HTTP(501,'generic.jsonp diasbled for security reasons')
+   raise HTTP(501,'generic.jsonp disabled for security reasons')
 
 try:
        from gluon.serializers import json