upgrade to latest OH release if cannot determine

Signed-off-by: Markus Storm <markus.storm@gmx.net>

functions/openhab.bash

@@ -49,6 +49,7 @@ openhab_setup() {
   local introText
   local keyName="openhab"
   local openhabVersion
+  local installVersion
   local repo
   local successText
 
@@ -92,7 +93,10 @@ openhab_setup() {
     if ! apt-get clean --yes -o DPkg::Lock::Timeout="$APTTIMEOUT"; then echo "FAILED (apt cache clean)"; return 1; fi
     if ! cond_redirect apt-get update; then echo "FAILED (update apt lists)"; return 1; fi
     openhabVersion="${3:-$(apt-cache madison ${ohPkgName} | head -n 1 | cut -d'|' -f2 | xargs)}"
-    if cond_redirect apt-get install --allow-downgrades --yes -o DPkg::Lock::Timeout="$APTTIMEOUT" --option Dpkg::Options::="--force-confnew" "${ohPkgName}=${openhabVersion}" "${ohPkgName}-addons=${openhabVersion}"; then echo "OK"; else echo "FAILED"; return 1; fi
+    if [[ -n $openhabVersion ]]; then
+      installVersion="${ohPkgName}=${openhabVersion}" "${ohPkgName}-addons=${openhabVersion}"
+    fi
+    if cond_redirect apt-get install --allow-downgrades --yes -o DPkg::Lock::Timeout="$APTTIMEOUT" --option Dpkg::Options::="--force-confnew" "$installVersion"; then echo "OK"; else echo "FAILED"; return 1; fi
   else
     echo -n "$(timestamp) [openHABian] Installing cached openHAB version... "
     if cond_redirect apt-get install --yes -o DPkg::Lock::Timeout="$APTTIMEOUT" --option Dpkg::Options::="--force-confnew" ${ohPkgName} ${ohPkgName}-addons; then echo "OK"; else echo "FAILED"; return 1; fi