JSHint the library and fix a few bugs

lib/handlebars/base.js

@@ -1,4 +1,6 @@
 // BEGIN(BROWSER)
+
+/*jshint eqnull:true*/
 var Handlebars = {};
 
 Handlebars.VERSION = "1.0.beta.5";

lib/handlebars/compiler/compiler.js

@@ -1,6 +1,8 @@
 var Handlebars = require("./base");
 
 // BEGIN(BROWSER)
+
+/*jshint eqnull:true*/
 Handlebars.Compiler = function() {};
 Handlebars.JavaScriptCompiler = function() {};
 
@@ -139,7 +141,7 @@ Handlebars.JavaScriptCompiler = function() {};
 
     compileProgram: function(program) {
       var result = new this.compiler().compile(program, this.options);
-      var guid = this.guid++;
+      var guid = this.guid++, depth;
 
       this.usePartial = this.usePartial || result.usePartial;
 
@@ -643,7 +645,7 @@ Handlebars.JavaScriptCompiler = function() {};
     },
 
     invokePartial: function(context) {
-      params = [this.nameLookup('partials', context, 'partial'), "'" + context + "'", this.popStack(), "helpers", "partials"];
+      var params = [this.nameLookup('partials', context, 'partial'), "'" + context + "'", this.popStack(), "helpers", "partials"];
 
       if (this.options.data) {
         params.push("data");
@@ -682,7 +684,8 @@ Handlebars.JavaScriptCompiler = function() {};
       if(guid == null) { return "self.noop"; }
 
       var child = this.environment.children[guid],
-          depths = child.depths.list;
+          depths = child.depths.list, depth;
+
       var programParams = [child.index, child.name, "data"];
 
       for(var i=0, l = depths.length; i<l; i++) {