CSS: use isFinite in place of redundant isNumeric

Author: timmywil

src/css.js

@@ -306,7 +306,7 @@ jQuery.extend( {
 		// Make numeric if forced or a qualifier was provided and val looks numeric
 		if ( extra === "" || extra ) {
 			num = parseFloat( val );
-			return extra === true || jQuery.isNumeric( num ) ? num || 0 : val;
+			return extra === true || isFinite( num ) ? num || 0 : val;
 		}
 		return val;
 	}