[monitoring-plugins] uriparser: do not reset flags if already set

[Sven Nierlein]

 Module: monitoring-plugins
 Branch: feature_check_curl
 Commit: 7501ba9f8a34413147281bed0b32b89da1ce2cb7
 Author: Sven Nierlein <sven at nierlein.de>
   Date: Tue Oct 23 17:01:44 2018 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=7501ba9

uriparser: do not reset flags if already set

---

 m4/uriparser.m4 | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/m4/uriparser.m4 b/m4/uriparser.m4
index c77f764..dbb8a55 100644
--- a/m4/uriparser.m4
+++ b/m4/uriparser.m4
@@ -31,7 +31,9 @@ AC_DEFUN([URIPARSER_CHECK],
 
      AC_CHECK_PROG(PKGCONFIG,pkg-config,pkg-config,no)
 
-     if test -d "$_uriparser_with" ; then
+     if test "x$URIPARSER" != "x" || test "x$URIPARSER_CPPFLAGS" != "x"; then
+        :
+     elif test -d "$_uriparser_with" ; then
         URIPARSER_CPPFLAGS="-I$withval/include"
         _uriparser_ldflags="-L$withval/lib"
 
@@ -73,14 +75,14 @@ AC_DEFUN([URIPARSER_CHECK],
 
         unset _uriparser_wanted
      else
-        dnl no pkg-config, ok, to our best and set some defaults
+        dnl no pkg-config, ok, do our best and set some defaults
         URIPARSER_CPPFLAGS="-I/usr/include"
         URIPARSER="-luriparser -L/usr/lib -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/i686-linux-gnu"
      fi
 
      if test $_uriparser_try_link = yes ; then
 
-        # we didn't find curl-config, so let's see if the user-supplied
+        # let's see if the user-supplied
         # link line (or failing that, "-luriparser") is enough.
         URIPARSER=${URIPARSER-"$_uriparser_ldflags -luriparser"}