db_lock, archive/bz2, ...: workaround for G_STATIC_MUTEX_INIT warning

src/archive/bz2_archive_plugin.c

@@ -103,6 +103,11 @@ bz2_destroy(struct bz2_input_stream *data)
 
 /* archive open && listing routine */
 
+#if GCC_CHECK_VERSION(4, 2)
+/* workaround for a warning caused by G_STATIC_MUTEX_INIT */
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
 static struct archive_file *
 bz2_open(const char *pathname, GError **error_r)
 {

src/db_lock.c

@@ -19,6 +19,12 @@
 
 #include "config.h"
 #include "db_lock.h"
+#include "gcc.h"
+
+#if GCC_CHECK_VERSION(4, 2)
+/* workaround for a warning caused by G_STATIC_MUTEX_INIT */
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
 
 GStaticMutex db_mutex = G_STATIC_MUTEX_INIT;