Handle null in more from* methods

lime/audio/AudioBuffer.hx

@@ -58,20 +58,22 @@ class AudioBuffer {
 		#end
 		
 	}
-
-
+	
+	
 	#if lime_console
 	@:void
 	private static function finalize (a:AudioBuffer):Void {
-
+		
 		a.dispose ();
-
+		
 	}
 	#end
 	
 	
 	public static function fromBytes (bytes:Bytes):AudioBuffer {
 		
+		if (bytes == null) return null;
+		
 		#if lime_console
 		
 		lime.Lib.notImplemented ("AudioBuffer.fromBytes");
@@ -100,6 +102,8 @@ class AudioBuffer {
 	
 	public static function fromFile (path:String):AudioBuffer {
 		
+		if (path == null) return null;
+		
 		#if lime_console
 		
 		var mode = StringTools.endsWith(path, ".wav") ? FMODMode.LOOP_OFF : FMODMode.LOOP_NORMAL;

lime/graphics/Image.hx

@@ -513,6 +513,7 @@ class Image {
 	
 	public static function fromFile (path:String, onload:Image -> Void = null, onerror:Void -> Void = null):Image {
 		
+		if (image == null) return null;
 		var image = new Image ();
 		image.__fromFile (path, onload, onerror);
 		return image;

lime/text/Font.hx

@@ -83,6 +83,8 @@ class Font {
 	
 	public static function fromBytes (bytes:Bytes):Font {
 		
+		if (bytes == null) return null;
+		
 		var font = new Font ();
 		font.__fromBytes (bytes);
 		
@@ -97,6 +99,8 @@ class Font {
 	
 	public static function fromFile (path:String):Font {
 		
+		if (path == null) return null;
+		
 		var font = new Font ();
 		font.__fromFile (path);