define TIME_T_IS_SIGNED on windows

svn:r4676

src/win32/orconfig.h

@@ -209,6 +209,9 @@
 /* Define to 1 if you have the ANSI C header files. */
 #define STDC_HEADERS
 
+/* Define to 1 if time_t is signed. */
+#define TIME_T_IS_SIGNED
+
 /* Define to 1 iff unaligned int access is allowed */
 #define UNALIGNED_INT_ACCESS_OK