Reduce the snippet returned from getMethodAssignments and avoid a possible infinite loop when removing dead vars.

Former-commit-id: 06b49c9ecdf0b279f7d81274d82a813488e9dd26

dist/lodash.underscore.js

@@ -4386,6 +4386,9 @@
   lodash.take = first;
   lodash.head = first;
 
+  // add functions to `lodash.prototype`
+  mixin(lodash);
+
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -4397,9 +4400,6 @@
    */
   lodash.VERSION = '1.3.1';
 
-  // add functions to `lodash.prototype`
-  mixin(lodash);
-
   // add "Chaining" functions to the wrapper
   lodash.prototype.chain = wrapperChain;
   lodash.prototype.value = wrapperValueOf;