Fix bug plant keep growing (#4173)

# About the pull request

Fixes #3368 


# Explain why it's good for the game


# Testing Photographs and Procedure
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<summary>Screenshots & Videos</summary>

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# Changelog


:cl:
fix: The plant dies if no nutriment is available
/:cl:

code/modules/hydroponics/hydro_tray.dm

@@ -210,11 +210,14 @@
 
 	// Make sure the plant is not starving or thirsty. Adequate
 	// water and nutrients will cause a plant to become healthier.
+	// Checks if there are sufficient enough nutrients, if not the plant dies.
 	var/healthmod = rand(1,3) * HYDRO_SPEED_MULTIPLIER
 	if(seed.requires_nutrients && prob(35))
 		plant_health += (nutrilevel < 2 ? -healthmod : healthmod)
 	if(seed.requires_water && prob(35))
 		plant_health += (waterlevel < 10 ? -healthmod : healthmod)
+	if(nutrilevel < 1)
+		plant_health = 0
 
 	// Check that pressure, heat and light are all within bounds.
 	// First, handle an open system or an unconnected closed system.