Fix function evaluation by newer SpiderMonkey's.

Found this error using the Debian package for SM 1.8.5 and have since
had reports of users seeing it as well. The basic error is that some
versions of SpiderMonkey appear to dislike this call to eval:

    eval("function(){}");

The fix is simply to wrap the function source in parenthesis so that
SM is convinced that it knows how to evaluate a function.



git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@1176666 13f79535-47bb-0310-9956-ffa450edef68

share/server/util.js

@@ -63,7 +63,11 @@ var Couch = {
   },
   compileFunction : function(source, ddoc) {    
     if (!source) throw(["error","not_found","missing function"]);
-
+    // Some newer SpiderMonkey's appear to not like evaluating
+    // an anonymous function at global scope. Simple fix just
+    // wraps the source with parens so the function object is
+    // returned correctly.
+    source = "(" + source + ")";
     var evaluate_function_source = function(source, evalFunction, sandbox) {
       sandbox = sandbox || {};
       if(typeof CoffeeScript === "undefined") {