More Misc Sentry Fixes (#22496)

Sorting runtime errors by most events in the past 2 weeks, here's a few
fixes for the following:

https://aurorastation.sentry.io/issues/7472147004 - Runtime when someone
attempts to move before their character is placed in the world.

https://aurorastation.sentry.io/issues/7443212526 - Runtime when
harvesting plants

https://aurorastation.sentry.io/issues/7466716994 - Runtime when
vampires try to drink a bloodbag

https://aurorastation.sentry.io/issues/7496800530 - Runtime when a
player disconnects while a tgui window is open.

code/modules/tgui_input/number.dm

@@ -24,6 +24,8 @@
 			user = client.mob
 		else
 			return
+	if (!user.client)
+		return
 	// Client does NOT have tgui_input on: Returns regular input
 	if(!user.client.prefs.tgui_inputs)
 		var/input_number = input(user, message, title, default) as null|num
@@ -111,6 +113,9 @@
 	return GLOB.always_state
 
 /datum/tgui_input_number/ui_static_data(mob/user)
+	if (!user.client)
+		return list()
+
 	var/list/data = list()
 	data["init_value"] = default // Default is a reserved keyword
 	data["large_buttons"] = user.client.prefs.tgui_buttons_large

code/modules/tgui_input/text.dm

@@ -24,6 +24,9 @@
 			user = client.mob
 		else
 			return
+	if (!user.client)
+		return
+
 	// Client does NOT have tgui_input on: Returns regular input
 	if(!user.client.prefs.tgui_inputs)
 		if(encode)
@@ -109,6 +112,9 @@
 	return GLOB.always_state
 
 /datum/tgui_input_text/ui_static_data(mob/user)
+	if (!user.client)
+		return list()
+
 	var/list/data = list()
 	data["large_buttons"] = user.client.prefs.tgui_buttons_large
 	data["swapped_buttons"] = user.client.prefs.tgui_inputs_swapped