Ensure resize error from C++ is wrapped

Thanks to @papandreou

README.md

@@ -590,6 +590,7 @@ This module would never have been possible without the help and code contributio
 * [Julian Walker](https://github.com/julianwa)
 * [Amit Pitaru](https://github.com/apitaru)
 * [Brandon Aaron](https://github.com/brandonaaron)
+* [Andreas Lind](https://github.com/papandreou)
 
 Thank you!
 

package.json

@@ -10,7 +10,8 @@
     "Daniel Gasienica <daniel@gasienica.ch>",
     "Julian Walker <julian@fiftythree.com>",
     "Amit Pitaru <pitaru.amit@gmail.com>",
-    "Brandon Aaron <hello.brandon@aaron.sh>"
+    "Brandon Aaron <hello.brandon@aaron.sh>",
+    "Andreas Lind <andreas@one.com>"
   ],
   "description": "High performance Node.js module to resize JPEG, PNG and WebP images using the libvips library",
   "scripts": {
@@ -45,7 +46,7 @@
     "nan": "^1.3.0"
   },
   "devDependencies": {
-    "mocha": "^1.21.5",
+    "mocha": "^2.0.0",
     "mocha-jshint": "^0.0.9",
     "istanbul": "^0.3.2",
     "coveralls": "^2.11.2"

src/resize.cc

@@ -586,7 +586,7 @@ class ResizeWorker : public NanAsyncWorker {
     Handle<Value> argv[3] = { NanNull(), NanNull(),  NanNull() };
     if (!baton->err.empty()) {
       // Error
-      argv[0] = NanNew<String>(baton->err.data(), baton->err.size());
+      argv[0] = Exception::Error(NanNew<String>(baton->err.data(), baton->err.size()));
     } else {
       int width = baton->width;
       int height = baton->height;

test/unit/io.js

@@ -198,6 +198,15 @@ describe('Input/output', function() {
     done();
   });
 
+  it('Fail when input is invalid Buffer', function(done) {
+    sharp(new Buffer([0x1, 0x2, 0x3, 0x4]))
+      .toBuffer(function (err) {
+        assert.ok(err);
+        assert.ok(err instanceof Error);
+        done();
+      });
+  });
+
   it('Promises/A+', function(done) {
     sharp(fixtures.inputJpg).resize(320, 240).toBuffer().then(function(data) {
       sharp(data).toBuffer(function(err, data, info) {