enable-werror for LODE build

Change-Id: I4bcdeca96e59e2bc3a2a96f546d060504f020bc7
Reviewed-on: https://gerrit.libreoffice.org/13917Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>

configure.ac

@@ -4538,7 +4538,12 @@ if test -n "$enable_werror" -a "$enable_werror" != "no"; then
     ENABLE_WERROR="TRUE"
     AC_MSG_RESULT([yes])
 else
-    AC_MSG_RESULT([no])
+    if test -n "$LODE_HOME"; then
+        ENABLE_WERROR="TRUE"
+        AC_MSG_RESULT([yes])
+    else
+        AC_MSG_RESULT([no])
+    fi
 fi
 AC_SUBST(ENABLE_WERROR)