Fix method name in error message

- compile -> precompile

lib/handlebars/compiler/compiler.js

@@ -1229,7 +1229,7 @@ Handlebars.JavaScriptCompiler = function() {};
 
 Handlebars.precompile = function(input, options) {
   if (!input || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
-    throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.compile. You passed " + input);
+    throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.precompile. You passed " + input);
   }
 
   options = options || {};

spec/qunit_spec.js

@@ -1364,7 +1364,7 @@ test("bug reported by @fat where lambdas weren't being properly resolved", funct
 test("Passing falsy values to Handlebars.compile throws an error", function() {
   shouldThrow(function() {
     CompilerContext.compile(null);
-  }, "You must pass a string or Handlebars AST to Handlebars.compile. You passed null");
+  }, "You must pass a string or Handlebars AST to Handlebars.precompile. You passed null");
 });
 
 test('GH-408: Multiple loops fail', function() {