[gparted] Avoid compiler warning

[Curtis Gedak <gedakc src gnome org>]

commit c722047c367a1b24acbef9155935527ed1098656
Author: Petr Uzel <petr uzel suse cz>
Date:   Wed Mar 10 09:11:40 2010 -0700

    Avoid compiler warning
    
    Report of this problem can be found in the mailing list archive:
    http://sourceforge.net/mailarchive/forum.php?thread_name=4B967C26.2090608%40gmail.com&forum_name=gparted-devel

 src/Dialog_Partition_Copy.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Dialog_Partition_Copy.cc b/src/Dialog_Partition_Copy.cc
index cc56f4d..9f4ea0c 100644
--- a/src/Dialog_Partition_Copy.cc
+++ b/src/Dialog_Partition_Copy.cc
@@ -99,7 +99,7 @@ void Dialog_Partition_Copy::Set_Data( const Partition & selected_partition, cons
 				copied_partition .sectors_used, GParted::UNIT_MIB ) / (TOTAL_MB/500.00) ) ) ;
 	
 	if ( fs .grow )
-		fs .MAX = ( ! fs .MAX || fs .MAX > (TOTAL_MB * MEBIBYTE) ) ? (TOTAL_MB * MEBIBYTE) : fs .MAX -= BUF ;
+		fs .MAX = ( ! fs .MAX || fs .MAX > (TOTAL_MB * MEBIBYTE) ) ? (TOTAL_MB * MEBIBYTE) : fs .MAX - BUF ;
 	else
 		fs .MAX = copied_partition .get_length() ;