Unreachable code in thumbhash_encoder_create function

[skidder]

The thumbhash_encoder_create function includes a null-check on the return value from new; however, if new were to fail, the default behavior is to throw an std::bad_alloc exception rather than return null, making the if-condition unreachable.

lilliput/thumbhash.cpp

Lines 18 to 21 in 217a9d5

	thumbhash_encoder e = new struct thumbhash_encoder_struct();
	if (!e) {
	return NULL;
	}