Do not could exlcuded files in disk space calculation. Backported.

--- ./build/files.c.orig	2005-12-14 19:22:43.000000000 +0000
+++ ./build/files.c	2006-02-17 13:57:25.000000000 +0000
@@ -1677,7 +1689,7 @@ static int addFile(FileList fl, const ch
 	} else
 	    i = fl->fileListRecsUsed;
 
-	if (S_ISREG(flp->fl_mode) && i >= fl->fileListRecsUsed)
+	if (!(flp->flags & RPMFILE_EXCLUDE) && S_ISREG(flp->fl_mode) && i >= fl->fileListRecsUsed)
 	    fl->totalFileSize += flp->fl_size;
     }