gcc 6.2 warnings: fix code indentation

This fixes the following correct -Wmisleading-indentation warning
messages of gcc 6.2:

irc-write.c: In function ‘IRC_SendWallops’:
irc-write.c:521:4: warning: this ‘if’ clause does not guard...
irc-write.c:524:5: note: ...this statement, but the latter is
  misleadingly indented as if it is guarded by the ‘if’
irc-write.c:526:4: warning: this ‘if’ clause does not guard... []
irc-write.c:529:5: note: ...this statement, but the latter is
  misleadingly indented as if it is guarded by the ‘if’

irc-info.c: In function ‘IRC_STATS’:
irc-info.c:895:3: warning: this ‘else’ clause does not guard...
irc-info.c:897:4: note: ...this statement, but the latter is
  misleadingly indented as if it is guarded by the ‘else’

No functional changes, the code has been correct, but the indentation
was wrong ...