make install dies due to empty INSTALL_LIBS

Hi,

the subject almost already says it. In line 767 of mk/target.mk
from ghc-6.4.20050215, make install dies because INSTALL_LIBS is
" " instead of "", causing a shell syntax error:

make[1]: Entering directory `/var/tmp/ghc-6.4.20050215/ghc'
for i in  ; do \
    ^^^^^^^^^^^^^
[snip]
/bin/sh: -c: line 1: syntax error near unexpected token `;'

Greetings,
Remi

-- 
Nobody can be exactly like me. Even I have trouble doing it.