Coverity Scan - Identical code for different branches

[raghvendra-dixit]

File: https://github.com/streadway/amqp/blob/master/read.go
Details:

1. The condition is redundant
   In github.​com/streadway/amqp.​readFloat32(io.​Reader): The same code is executed regardless of the condition (CWE-398)
2. The condition is redundant
   In github.​com/streadway/amqp.​readFloat64(io.​Reader): The same code is executed regardless of the condition (CWE-398)
   Screenshots:

2.