added filter:image.size

fix uploading of gifs if imagemagick plugin is installed but no image
upload plugins are present.

src/controllers/uploads.js

@@ -83,7 +83,7 @@ function resizeImage(fileObj, callback) {
 		function(next) {
 			fullPath = path.join(nconf.get('base_dir'), nconf.get('upload_path'), '..', fileObj.url);
 
-			image.load(fullPath, next);
+			image.size(fullPath, next);
 		},
 		function (imageData, next) {
 			if (imageData.width < parseInt(meta.config.maximumImageWidth, 10) || 760) {

src/image.js

@@ -94,11 +94,19 @@ image.normalise = function(path, extension, callback) {
 	}
 };
 
-image.load = function(path, callback) {
-	new Jimp(path, function(err, data) {
-		callback(err, data ? data.bitmap : null);
-	});
-};
+image.size = function(path, callback) {
+	if (plugins.hasListeners('filter:image.size')) {
+		plugins.fireHook('filter:image.size', {
+			path: path,
+		}, function(err, image) {
+			callback(err, image);
+		});
+	} else {
+		new Jimp(path, function(err, data) {
+			callback(err, data ? data.bitmap : null);
+		});
+	}
+}
 
 image.convertImageToBase64 = function(path, callback) {
 	fs.readFile(path, function(err, data) {