2014-01-22: added further checks into the repl.

added further checks into the repl.

diff --git a/wisp-repl-guile.sh b/wisp-repl-guile.sh
--- a/wisp-repl-guile.sh
+++ b/wisp-repl-guile.sh
@@ -2,7 +2,12 @@
 
 # if the spec file does not exist yet, run the build chain
 if test ! -f language/wisp/spec.scm; then
-    autoreconf -i && ./configure && make
+    autoreconf -i && ./configure && make check
 fi
 
-guile -L . --language=wisp
+# if the file still does not exist, our chain is broken
+if test ! -f language/wisp/spec.scm; then
+    echo "ERROR: wisp failed to compile. Please check the previous output."
+else
+    guile -L . --language=wisp
+fi