Patch for MATE Power Manager 1.8.0 to fix redundant/incorrect signal handling of backlight brightness change

1005_fix-brightness-signal-handling.patch

From: Flos Lonicerae <lonicerae@users.noreply.github.com>
Subject: Fix brightness change signal handling
Bug: https://github.com/mate-desktop/mate-power-manager/issues/76
Bug-Debian: https://bugs.debian.org/785017

--- a/src/gpm-backlight.c
+++ b/src/gpm-backlight.c
@@ -642,10 +642,6 @@
 		g_settings_set_double(backlight->priv->settings, GPM_SETTINGS_BRIGHTNESS_AC, percentage*1.0f);
 		egg_debug ("saving brightness for ac supply: %i", percentage);
 	}
-
-	/* we emit a signal for the brightness applet */
-	egg_debug ("emitting brightness-changed : %i", percentage);
-	g_signal_emit (backlight, signals [BRIGHTNESS_CHANGED], 0, percentage);
 }
 
 /**
@@ -735,7 +731,7 @@
 
 	/* watch for manual brightness changes (for the popup widget) */
 	backlight->priv->brightness = gpm_brightness_new ();
-	g_signal_connect (backlight->priv->brightness, "brightness-changed",
+	g_signal_connect (backlight, "brightness-changed",
 			  G_CALLBACK (brightness_changed_cb), backlight);
 
 	/* we use up_client for the ac-adapter-changed signal */