NullPointerException on `OpenSSHKeyV1KeyFile.java`

[오지환 (Cooper)]

sshj/src/main/java/com/hierynomus/sshj/userauth/keyprovider/OpenSSHKeyV1KeyFile.java

Line 215 in f4d34d8

 while (!line.startsWith(END)) { 

java.lang.NullPointerException: Cannot invoke "String.startsWith(String)" because "line" is null

[오지환 (Cooper)]

reader.readLine()

A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached without reading any characters

[Jeroen van Erp]

PR for this has been merged in #898