Utility sign function for Flixel

FlxU-sign.patch

diff -Bbwur AdamAtomic-flixel-8989e50/org/flixel/FlxU.as AdamAtomic-flixel-8989e50-new/org/flixel/FlxU.as
--- AdamAtomic-flixel-8989e50/org/flixel/FlxU.as	2011-08-22 09:03:52 +0400
+++ AdamAtomic-flixel-8989e50-new/org/flixel/FlxU.as	2012-04-21 20:04:29 +0400
@@ -20,6 +20,18 @@
 		}
 		
 		/**
+		 * Extract the sign of a number.
+		 * 
+		 * @param	Value	Any number.
+		 * 
+		 * @return	In case Value < 0 returns -1, otherwise returns 1
+		 */
+		static public function sign(Value:Number):Number
+		{
+			return (Value<0)?-1:1;
+		}
+		
+		/**
 		 * Calculate the absolute value of a number.
 		 * 
 		 * @param	Value	Any number.