cleanup variable and syntax

Author: trevnorris

src/special.js

@@ -1,9 +1,6 @@
 // Special functions //
 (function( jStat, Math ) {
 
-// private functions
-
-
 // extending static jStat methods
 jStat.extend({
 
@@ -414,21 +411,23 @@ jStat.extend({
 	// If n and m are specified it returns a jstat object of normal deviates.
 	randn : function( n, m ) {
 		m = m || n;
+
+		var u, v, x, y, q, mat;
+
 		if( n ) {
-			var mat = jStat.zeros( n,m );
+			mat = jStat.zeros( n,m );
 			mat.alter(function() {return jStat.randn();} );
 			return mat;
 		}
-		var u, v, x, y, q;
 
 		do {
 			u = Math.random();
 			v = 1.7156 * ( Math.random() - 0.5 );
 			x = u - 0.449871;
 			y = Math.abs( v ) + 0.386595;
 			q = x*x + y * ( 0.19600 * y - 0.25472 * x );
-		} while( q > 0.27597
-			&& ( q > 0.27846 || v*v > -4 * Math.log( u ) * u*u ) );
+		} while( q > 0.27597 && ( q > 0.27846 || v*v > -4 * Math.log( u ) * u*u ) );
+
 		return v / u;
 	},