Removed remaining references to Fixnum/Bignum

Replaced them with Integer

Author: herwinw

lib/xmlrpc/client.rb

@@ -237,7 +237,7 @@ def password=(new_password)
     # Each parameter of +args+ must be of one of the following types,
     # where Hash, Struct and Array can contain any of these listed _types_:
     #
-    # * Fixnum, Bignum
+    # * Integer
     # * TrueClass, FalseClass, +true+, +false+
     # * String, Symbol
     # * Float
@@ -255,7 +255,7 @@ def password=(new_password)
     #
     # The type of the return-value is one of the types shown above.
     #
-    # A Bignum is only allowed when it fits in 32-bit. A XML-RPC
+    # An Integer is only allowed when it fits in 32-bit. A XML-RPC
     # +dateTime.iso8601+ type is always returned as a XMLRPC::DateTime object.
     # Struct is never returned, only a Hash, the same for a Symbol, where as a
     # String is always returned. XMLRPC::Base64 is returned as a String from

lib/xmlrpc/create.rb

@@ -177,14 +177,14 @@ def conv2value(param) # :doc:
 
         val = case param
         when Integer
-          # XML-RPC's int is 32bit int, and Fixnum also may be beyond 32bit
+          # XML-RPC's int is 32bit int
           if Config::ENABLE_BIGINT
             @writer.tag("i4", param.to_s)
           else
             if param >= -(2**31) and param <= (2**31-1)
               @writer.tag("i4", param.to_s)
             else
-              raise "Bignum is too big! Must be signed 32-bit integer!"
+              raise "Integer is too big! Must be signed 32-bit integer!"
             end
           end
         when TrueClass, FalseClass