Allow sunrpc_create to raise on its own

Author: jhart-r7

modules/exploits/aix/rpc_cmsd_opcode21.rb

@@ -80,9 +80,7 @@ def brute_exploit(brute_target)
     print_status("Trying to exploit rpc.cmsd with address 0x%x ..." % brute_target['Ret'])
 
     begin
-      if (not sunrpc_create('udp', 100068, 4))
-        fail_with(Failure::Unknown, 'sunrpc_create failed')
-      end
+      sunrpc_create('udp', 100068, 4)
 
       # spray the heap a bit (work around powerpc cache issues)
       buf = make_nops(1024 - @aixpayload.length)

modules/exploits/windows/emc/networker_format_string.rb

@@ -74,9 +74,7 @@ def initialize(info = {})
   def exploit
 
     begin
-      if (not sunrpc_create('tcp', 0x5F3DD, 2))
-        fail_with(Failure::Unknown, 'sunrpc_create failed')
-      end
+      sunrpc_create('tcp', 0x5F3DD, 2)
 
       fs = "%n" * target['Offset']
       fs << [target.ret].pack("V") # push esp # ret from MSVCR71.dll