Fix build with -fno-common

Imported from https://src.fedoraproject.org/rpms/imsettings/raw/master/f/imsettings-gcc10.patch

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

diff -pruN imsettings-1.8.2.orig/imsettings-daemon/imsettings-server.c imsettings-1.8.2/imsettings-daemon/imsettings-server.c
--- imsettings-1.8.2.orig/imsettings-daemon/imsettings-server.c	2019-11-14 14:08:03.000000000 +0900
+++ imsettings-1.8.2/imsettings-daemon/imsettings-server.c	2020-01-29 13:32:50.827832726 +0900
@@ -91,7 +91,7 @@ GDBusInterfaceVTable __iface_vtable = {
 	NULL,
 	NULL,
 };
-guint signals[LAST_SIGNAL];
+static guint signals[LAST_SIGNAL];
 
 G_DEFINE_TYPE_WITH_PRIVATE (IMSettingsServer, imsettings_server, G_TYPE_OBJECT);
 G_LOCK_DEFINE_STATIC (logger);
