Fixed a possible nullptr exception caused by getEnergyContainer returning null on a block that is an energy container.

[nullTheCoder]

Made a null check after get block energy container instead of checking for block to be an energy container in distributeEnergyNearby.

Problem caused by there being no null check after getting energy: In a mod of mine, when a create: crafts and additions (forge 1.20.1) accumulator is placed adjacent to its generator block, it would crash the game java.lang.NullPointerException: Cannot invoke "earth.terrarium.botarium.common.energy.base.EnergyContainer.insertEnergy(long, boolean)" because "energy" is null, there is a possibility that a similar crash could happen with other mods.

Tested:

• Forge: Nothing appears to be broken and the above issue has been fixed.
• Fabric: No testing done, however there shouldn't be any issues.

Changes in the commit:

• replaced checking if a block is an energy block with checking with instead checking if energyContainer is null after it.
• Some import changes by Intellij IDEA

Possible issues that could be caused:

• none, in both forge and fabric energy container getting function first checks if that block is an energy container.

[CLAassistant]

All committers have signed the CLA.