silence glib log output during fuzzing on oss-fuzz

src/fe-fuzz/irc/core/Makefile.am

@@ -22,6 +22,7 @@ LDADD = \
 	$(FUZZER_LIBS)
 
 event_get_params_fuzz_SOURCES = \
+        ../../null-logger.c \
         event-get-params.c \
 	$(top_srcdir)/src/fe-text/module-formats.c
 

src/fe-fuzz/irc/core/event-get-params.c

@@ -28,6 +28,7 @@
 #include <irssi/src/core/args.h>
 #include <irssi/src/fe-common/core/printtext.h>
 #include <irssi/src/irc/core/irc.h>
+#include <irssi/src/fe-fuzz/null-logger.h>
 
 #include <stddef.h>
 #include <stdint.h>
@@ -35,6 +36,9 @@
 #include <string.h>
 
 int LLVMFuzzerInitialize(int *argc, char ***argv) {
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+	g_log_set_null_logger();
+#endif
 	core_register_options();
 	fe_common_core_register_options();
 	/* no args */

src/fe-fuzz/irc/core/meson.build

@@ -2,6 +2,7 @@
 
 executable('event-get-params-fuzz',
   files(
+    '../../null-logger.c',
     'event-get-params.c',
     '../../../fe-text/module-formats.c',
   ),