Fix error 'tried to create Proc object without a block (ArgumentError)'

[raj-sharan]

proc.c (proc_new): promoted lambda/proc/Proc.new with no block in a method called with a block to a warning/error

[raj-sharan]

test>ruby test.rb 'DSN' 'user' 'pwd'
Ruby-ODBC: Force Encoding ruby result strings to UTF-8
connect.............ok
create_table........ok
insert..............ok
select..............ok
update..............ok
drop_table..........ok
close...............ok

\test>ruby utf8\test.rb 'DSN' 'user' 'pwd'
connect.............ok
create_table........ok
insert..............ok
select..............ok
update..............ok
drop_table..........ok
close...............ok

[sukeerthiadiga]

Approved based on the passing tests.