Fixed server forcing players afloat

* Fixes #1131

src/Entities/Entity.cpp

@@ -1089,8 +1089,11 @@ void cEntity::HandleAir(void)
 	// Get the type of block the entity is standing in:
 
 	if (IsSubmerged())
+	{
+		if (!IsPlayer()) // Players control themselves
 		{
 			SetSpeedY(1); // Float in the water
+		}
 
 		// Either reduce air level or damage player
 		if (m_AirLevel < 1)