Minor fix in the ./build wrapper for ocamlbuild

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15877 85f007b7-540e-0410-9357-904b9bb8a0f7

build

@@ -7,7 +7,7 @@ MYCFG=myocamlbuild_config.ml
 export CAML_LD_LIBRARY_PATH=`pwd`/_build/kernel/byterun
 
 check_config() {
- [ -f $MYCFG ] || (echo "please run ./configure first"; exit 1)
+ if [ ! -f $MYCFG ]; then echo "please run ./configure first"; exit 1; fi
 }
 
 ocb() { $OCAMLBUILD $FLAGS $*; }