odbc32: Define correct function prototypes for all libodbc entry points.

Fix the prototypes of the Unicode functions.
diff --git a/include/sqltypes.h b/include/sqltypes.h
index 6f1d25f..5c8f3ca 100644
--- a/include/sqltypes.h
+++ b/include/sqltypes.h
@@ -101,6 +101,16 @@
 typedef signed short            RETCODE;
 typedef void*                   SQLHWND;
 
+#ifdef _WIN64
+typedef INT64           SQLLEN;
+typedef UINT64          SQLULEN;
+typedef UINT64          SQLSETPOSIROW;
+#else
+#define SQLLEN          SQLINTEGER
+#define SQLULEN         SQLUINTEGER
+#define SQLSETPOSIROW   SQLUSMALLINT
+#endif
+
 typedef SQLHANDLE          		HENV;
 typedef SQLHANDLE          		HDBC;
 typedef SQLHANDLE          		HSTMT;