Flammable blocks don't burn properly

The checkbox to make blocks flammable only makes it so blocks can catch on fire. However, these blocks will burn indefinitely instead of disappearing. It's possible to fix the issue by adding these pieces of code:

// How quickly the block is destroyed, return an int between 0 and 300
public int getFlammability(IBlockAccess world, BlockPos pos, EnumFacing face) {
	return 5;
}

// How quickly fire spreads from this block, return an integer
public int getFireSpreadSpeed(IBlockAccess world, BlockPos pos, EnumFacing face) {
	return 20;
}

Some vanilla values are:

• 5, 20 for planks and related blocks;
• 5, 5 for logs and coal blocks;
• 30, 60 for leaves and wool;
• 60, 100 for most plants