fix time out range error in ruby 1.8.7

Author: zzzhc

ext/mysql2/result.c

@@ -4,7 +4,7 @@
 static rb_encoding *binaryEncoding;
 #endif
 
-#define MYSQL2_MAX_YEAR 2058
+#define MYSQL2_MAX_YEAR 2038
 
 #ifdef NEGATIVE_TIME_T
   /* 1901-12-13 20:45:52 UTC : The oldest time in 32-bit signed time_t. */

spec/mysql2/result_spec.rb

@@ -173,6 +173,11 @@
       r.first['test'].class.should eql(DateTime)
     end
 
+    it "should return DateTime when time > year 2038" do
+      r = @client.query("SELECT CAST('2039-01-01 01:01:01' AS DATETIME) as test")
+      r.first['test'].class.should eql(DateTime)
+    end
+
     it "should return Time for a TIMESTAMP value when within the supported range" do
       @test_result['timestamp_test'].class.should eql(Time)
       @test_result['timestamp_test'].strftime("%F %T").should eql('2010-04-04 11:44:00')