[win32-qxl]Undefine commonly named macros to avoid 'macro redefinition' warning.

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A change to spice-protocol adds spice/macros.h to the QXL driver build,
causing some macros to be redefined. The resulting compiler warnings
break the build.  Adding undef statements before the actual macro
definitions fixes the warnings.
---
 xddm/display/quic.c  | 1 +
 xddm/display/utils.h | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/xddm/display/quic.c b/xddm/display/quic.c
index ee12fab..8976962 100644
--- a/xddm/display/quic.c
+++ b/xddm/display/quic.c
@@ -60,6 +60,7 @@
 #define QUIC_VERSION_MINOR 1U
 #define QUIC_VERSION ((QUIC_VERSION_MAJOR << 16) | (QUIC_VERSION_MAJOR & 0xffff))
 
+#undef ABS
 #define ABS(a) ((a) >= 0 ? (a) : -(a))
 
 #ifdef ASSERT
diff --git a/xddm/display/utils.h b/xddm/display/utils.h
index a8d0de6..c69f9f9 100644
--- a/xddm/display/utils.h
+++ b/xddm/display/utils.h
@@ -22,12 +22,19 @@
 #ifndef _H_UTILS
 #define _H_UTILS
 
+#undef MIN
 #define MIN(x, y) (((x) <= (y)) ? (x) : (y))
+
+#undef MAX
 #define MAX(x, y) (((x) >= (y)) ? (x) : (y))
-#define ALIGN(a, b) (((a) + ((b) - 1)) & ~((b) - 1))
 
+#undef ALIGN
+#define ALIGN(a, b) (((a) + ((b) - 1)) & ~((b) - 1))
 
+#undef OFFSETOF
 #define OFFSETOF(type, member) ((UINT64)&((type *)0)->member)
+
+#undef CONTAINEROF
 #define CONTAINEROF(ptr, type, member) \
     ((type *) ((UINT8 *)(ptr) - OFFSETOF(type, member)))
 
-- 
1.9.5.msysgit.0


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