dinput: Add DISEQUENCE_COMPARE macro.

include/dinput.h

diff --git a/include/dinput.h b/include/dinput.h
index 05640bd..8c557eb 100644
--- a/include/dinput.h
+++ b/include/dinput.h
@@ -634,6 +634,8 @@
 
 #define DIGDD_PEEK		0x00000001
 
+#define DISEQUENCE_COMPARE(dwSq1,cmp,dwSq2) ((int)((dwSq1) - (dwSq2)) cmp 0)
+
 typedef struct DIDEVICEOBJECTDATA_DX3 {
     DWORD	dwOfs;
     DWORD	dwData;