Don't build the dbug manual.  We aren't going to install it anyway, so
there's no need to do so.  Attempting to build it causes crashes if one
has built with -DDBUG_OFF, as we do by default.  Per bug #437053.


diff -Naur mysql-5.0.51a.orig/dbug/Makefile.am mysql-5.0.51a/dbug/Makefile.am
--- mysql-5.0.51a.orig/dbug/Makefile.am	2008-01-11 09:43:29.000000000 -0500
+++ mysql-5.0.51a/dbug/Makefile.am	2008-07-27 12:21:56.000000000 -0400
@@ -35,7 +35,7 @@
 factorial_SOURCES =     my_main.c factorial.c
 dbug_analyze_SOURCES =  dbug_analyze.c
 
-all:            user.t user.ps
+all:
 
 user.t:         user.r $(NROFF_INC)
 		-nroff -mm user.r > $@