disable "dvi" target in TeX is not installed

BitKeeper/deleted/.del-stamp-h.in~d3fb1119ddf3630f:
  Delete: stamp-h.in
BitKeeper/etc/ignore:
  Added stamp-h.in to the ignore list

.bzrignore

@@ -307,3 +307,4 @@ bdb/include/db_ext.h
 bdb/include/mutex_ext.h
 mit-pthreads/syscall.S
 mit-pthreads/config.flags
+stamp-h.in

configure.in

@@ -172,6 +172,7 @@ test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
 # Not critical since the generated file is distributed
 AC_PROG_YACC
 AC_CHECK_PROG(PDFMANUAL, pdftex, manual.pdf)
+AC_CHECK_PROG(DVIS,      tex,    manual.dvi)
 
 AC_MSG_CHECKING("return type of sprintf")
 

stamp-h.in

-timestamp