ci: fix build on linux that do not have a recent enough ALSA

Author: jcelerier

include/libremidi/backends/alsa_seq/observer.hpp

@@ -319,7 +319,7 @@ class observer_impl
         // TODO
         break;
       }
-#if __has_include(<alsa/ump.h>)
+#if LIBREMIDI_ALSA_HAS_UMP_SEQ_EVENTS
       case SND_SEQ_EVENT_UMP_EP_CHANGE: {
         // TODO
         break;
@@ -440,7 +440,7 @@ class observer_threaded : public observer_impl<ConfigurationImpl>
       case SND_SEQ_EVENT_CLIENT_EXIT:
       case SND_SEQ_EVENT_CLIENT_CHANGE:
 
-#if __has_include(<alsa/ump.h>)
+#if LIBREMIDI_ALSA_HAS_UMP_SEQ_EVENTS
       case SND_SEQ_EVENT_UMP_EP_CHANGE:
       case SND_SEQ_EVENT_UMP_BLOCK_CHANGE:
 #endif

include/libremidi/backends/linux/alsa.hpp

@@ -13,6 +13,10 @@
   #if __has_include(<alsa/ump.h>) && SND_LIB_VERSION >= ((1 << 16) | (2 << 8) | 10)
     #define LIBREMIDI_ALSA_HAS_UMP 1
   #endif
+
+  #if __has_include(<alsa/ump.h>) && SND_LIB_VERSION >= ((1 << 16) | (2 << 8) | 14)
+    #define LIBREMIDI_ALSA_HAS_UMP_SEQ_EVENTS 1
+  #endif
 #endif
 
 namespace libremidi