gallium/util: Define isfinite and isnan for MSVC.

Define isfinite and isnan to _finite and _isnan respectively for MSVC.
Those macros are needed by st/vega.

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index ee52c09..6370e77 100644 (file)
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -168,6 +168,9 @@ static INLINE float logf( float f )
 #undef logf
 #define logf(x) ((float)log((double)(x)))
 #endif /* logf */
+
+#define isfinite(x) _finite((double)(x))
+#define isnan(x) _isnan((double)(x))
 #endif
 
 static INLINE double log2( double x )