fix NPE for err & msg in kafka_client.go #695
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panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xa32efb]
goroutine 269 [running]:
github.com/linkedin/Burrow/core/internal/consumer.(*KafkaClient).partitionConsumer(0xc000768fa0, 0xead338, 0xc00013d360, 0x0)
~/go/src/github.com/linkedin/Burrow/core/internal/consumer/kafka_client.go:270 +0x57b
created by github.com/linkedin/Burrow/core/internal/consumer.(*KafkaClient).startKafkaConsumer
~/go/src/github.com/linkedin/Burrow/core/internal/consumer/kafka_client.go:322 +0x8d6
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panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xa32efb]
goroutine 269 [running]:
github.com/linkedin/Burrow/core/internal/consumer.(*KafkaClient).partitionConsumer(0xc000768fa0, 0xead338, 0xc00013d360, 0x0)
~/go/src/github.com/linkedin/Burrow/core/internal/consumer/kafka_client.go:270 +0x57b
created by github.com/linkedin/Burrow/core/internal/consumer.(*KafkaClient).startKafkaConsumer
~/go/src/github.com/linkedin/Burrow/core/internal/consumer/kafka_client.go:322 +0x8d6
maybe related issue: #634 #353 ?