don't barf on undefined partial contexts, return the verbatim partial instead

CHANGES.md

@@ -6,6 +6,7 @@
 * Added more robust type detection.
 * Parse pragmas only once.
 * Throw exception when encountering an unknown pragma.
+* Ignore undefined partial contexts. Returns verbatim partials.
 
 
 ## 0.2.2 (11-02-2010)

examples/empty_partial.2.html

@@ -0,0 +1 @@
+yo

examples/empty_partial.html

@@ -0,0 +1,2 @@
+hey {{foo}}
+{{>partial}}

examples/empty_partial.js

@@ -0,0 +1,3 @@
+var partial_context = {
+  foo: 1
+};

examples/empty_partial.txt

@@ -0,0 +1,2 @@
+hey 1
+yo

mustache.js

@@ -85,12 +85,12 @@ var Mustache = function() {
       Tries to find a partial in the global scope and render it
     */
     render_partial: function(name, context, partials) {
-      if(typeof(context[name]) != "object") {
-        throw({message: "subcontext for '" + name + "' is not an object"});
-      }
       if(!partials || !partials[name]) {
         throw({message: "unknown_partial '" + name + "'"});
       }
+      if(typeof(context[name]) != "object") {
+        return partials[name];
+      }
       return this.render(partials[name], context[name], partials, true);
     },