glsl: Define va_copy on MSVC.

diff --git a/src/glsl/ralloc.c b/src/glsl/ralloc.c
index e92f433..fa2dd8b 100644 (file)
--- a/src/glsl/ralloc.c
+++ b/src/glsl/ralloc.c
@@ -38,6 +38,14 @@
 #define unlikely(x)     !!(x)
 #endif
 
+#ifndef va_copy
+#ifdef __va_copy
+#define va_copy(dest, src) __va_copy((dest), (src))
+#else
+#define va_copy(dest, src) (dest) = (src)
+#endif
+#endif
+
 #define CANARY 0x5A1106
 
 struct ralloc_header