lib/upnp/meson.build: refuse to build with libupnp >= 1.14.26 due to API breakage

This avoids MPD build breakages for users which have libupnp with the
API-breaking commit
 pupnp/pupnp@25d4bd0

We once had the conditional `const` loooong ago, but it was removed by
commit 736a696 ("drop support for
libupnp versions older than 1.8").  I don't want to add another
compile-time conditional because I don't understand the API change
yet.  I'm not even sure anybody even uses MPD with UPnP.  Let's see if
anybody complains (and re-submits the old pre-1.8 workaround, but I'd
prefer if the pupnp project reverts the API breakage instead).

See pupnp/pupnp#528

Author: MaxKellermann

NEWS

@@ -1,4 +1,6 @@
 ver 0.24.9 (not yet released)
+* database
+  - upnp: refuse to build with libupnp >= 1.14.26 due to API breakage
 
 ver 0.24.8 (2026/01/26)
 * input

src/lib/upnp/meson.build

@@ -12,12 +12,23 @@ endif
 
 if upnp_option == 'auto'
   upnp_dep = dependency('libupnp', version: '>= 1.8', required: false)
+
+  if upnp_dep.found() and upnp_dep.version().version_compare('>= 1.14.26')
+    warning('Your libupnp version is known to be broken, see https://github.com/pupnp/pupnp/issues/528 - disabling')
+    upnp_dep = dependency('', required: false)
+  endif
+
   conf.set('USING_PUPNP', upnp_dep.found())
   if not upnp_dep.found()
     upnp_dep = dependency('libnpupnp', version: '>= 1.8', required: false)
   endif
 elif upnp_option == 'pupnp'
   upnp_dep = dependency('libupnp', version: '>= 1.8', required: true)
+
+  if upnp_dep.found() and upnp_dep.version().version_compare('>= 1.14.26')
+    error('Your libupnp version is known to be broken, see https://github.com/pupnp/pupnp/issues/528')
+  endif
+
   conf.set('USING_PUPNP', true)
 elif upnp_option == 'npupnp'
   upnp_dep = dependency('libnpupnp', required: true)