Very minor code cleanup

Change-Id: Ie0b97da2cce7bb93307ed49b1138bc2f36df34d0
diff --git a/partition.cpp b/partition.cpp
index 9ff9061..626c612 100644
--- a/partition.cpp
+++ b/partition.cpp
@@ -2331,7 +2331,7 @@
 			goto exit;
 		}
 		backedup_size += (unsigned long long)(bs);
-		Remain = Remain - (unsigned long long)(bs);
+		Remain -= (unsigned long long)(bs);
 		if (part_settings->progress)
 			part_settings->progress->UpdateSize(backedup_size);
 		if (PartitionManager.Check_Backup_Cancel() != 0)
@@ -2398,9 +2398,9 @@
 		}
 	}
 
-	string Full_FileName, Restore_File_System = Get_Restore_File_System(part_settings);
+	string Full_FileName = part_settings->Backup_Folder + "/" + Backup_FileName;
+	string Restore_File_System = Get_Restore_File_System(part_settings);
 
-	Full_FileName = part_settings->Backup_Folder + "/" + Backup_FileName;
 	if (Is_Image(Restore_File_System)) {
 		Restore_Size = TWFunc::Get_File_Size(Full_FileName);
 		return Restore_Size;