php int error fixed

Author: jschwind

class-php-ico.php

@@ -187,7 +187,7 @@ function _add_image_data( $im ) {
 				$color = imagecolorat( $im, $x, $y );
 
 				$alpha = ( $color & 0x7F000000 ) >> 24;
-				$alpha = ( 1 - ( $alpha / 127 ) ) * 255;
+				$alpha = round( ( 1 - ( $alpha / 127 ) ) * 255);
 
 				$color &= 0xFFFFFF;
 				$color |= 0xFF000000 & ( $alpha << 24 );