#issue 384: fixing unbound var

Author: Robert McLay

README.new

@@ -9,4 +9,5 @@ Lmod 7.8+
    (7.8.5)  Define MCP and mcp earlier in lmod main() so that errors/warning found in SitePackage work.
             issue #383: Use LUA_PATH to evaluate Version.lua instead of depending on ./?.lua to be LUA_PATH.
 	    Added mgrload function and documentation
-	    
+   (7.8.6)  Fixed unbound variable in bash.in.
+   

init/bash.in

@@ -13,11 +13,11 @@ if [ -z "${LMOD_SH_DBG_ON+x}" ]; then
    esac;
 fi
 
-[ -n "${__lmod_vx}" ] && set +$__lmod_vx 
+[ -n "${__lmod_vx:-}" ] && set +$__lmod_vx 
 
 export LMOD_PKG=@PKGV@
 
-if [ -n "${__lmod_vx}" ]; then
+if [ -n "${__lmod_vx:-}" ]; then
     echo "Shell debugging temporarily silenced: export LMOD_SH_DBG_ON=1 for this output ($LMOD_PKG/init/bash)"
 fi