Fixes some runtimes [IDB IGNORE] (#17194)

* Fixes some runtimes

* typo

* No more infinite mannequins

* crash

* More runtime fixes and  pressure fling

Makes it so you can unwrench pipes that are pressurized, at the cost of being flung back from the pipe. Higher pressure = longer distance and faster.

* Fixes a memory leak and a bug

code/_helpers/atmospherics.dm

@@ -16,7 +16,7 @@
 /proc/atmosanalyzer_scan(var/atom/target, var/datum/gas_mixture/mixture, var/mob/user)
 	var/list/results = list()
 
-	if (mixture && mixture.total_moles > 0)
+	if(mixture && mixture.total_moles > 0)
 		var/pressure = mixture.return_pressure()
 		var/total_moles = mixture.total_moles
 		results += span_notice("Pressure: [round(pressure,0.1)] kPa")
@@ -42,10 +42,16 @@
 	return atmosanalyzer_scan(src, src.air_contents, user)
 
 /obj/machinery/atmospherics/pipe/atmosanalyze(var/mob/user)
-	return atmosanalyzer_scan(src, src.parent.air, user)
+	if(parent && parent.air) //Sometimes we may have a pipe that has no parent. This seems to happen if you add a pipe onto a pipeline, causing it to delete the parent for every pipe on that pipeline...Yeah. It's complicated and a bug.
+		return atmosanalyzer_scan(src, src.parent.air, user)
 
+// This one is strange. The connector is not guaranteed to have a network (if you placed it down by itself)
+// 'gases' is also a list. But the atmos analyzer wants you to give it a gas mixture.
+// The 'gases' list holds ONE gas mixture.
 /obj/machinery/atmospherics/portables_connector/atmosanalyze(var/mob/user)
-	return atmosanalyzer_scan(src, src.network.gases, user)
+	if(network && network.gases)
+		var/list/datum/gas_mixture/analyzed_gas = network.gases[1]
+		return atmosanalyzer_scan(src, analyzed_gas, user)
 
 /obj/machinery/atmospherics/unary/atmosanalyze(var/mob/user)
 	return atmosanalyzer_scan(src, src.air_contents, user)
@@ -67,7 +73,7 @@
 
 /obj/machinery/meter/atmosanalyze(var/mob/user)
 	var/datum/gas_mixture/mixture = null
-	if(src.target)
+	if(target && target.parent)
 		mixture = src.target.parent.air
 	return atmosanalyzer_scan(src, mixture, user)
 

code/_helpers/icons.dm

@@ -84,6 +84,8 @@
 	var/list/RGB2 = ReadRGB(rgb2)
 
 	// add missing alpha if needed
+	if(!RGB1 || !RGB2) //Don't blend if we don't two! No use blending what we don't have!
+		return
 	if(RGB1.len < RGB2.len) RGB1 += 255
 	else if(RGB2.len < RGB1.len) RGB2 += 255
 	var/usealpha = RGB1.len > 3