Fix converting byte notation not converted to bytes correctly if not …

…in M. Fxies #77

classes/wp-background-process.php

@@ -370,7 +370,7 @@ protected function get_memory_limit() {
 			$memory_limit = '32000M';
 		}
 
-		return intval( $memory_limit ) * 1024 * 1024;
+		return wp_convert_hr_to_bytes( $memory_limit );
 	}
 
 	/**