[PATCH 3/4] msvcrt: Don't set errno in _logb(f) if x is ±INF.

[Alex Henrie]

This behavior appears to be consistent across all versions of MSVC.

Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
---
 dlls/msvcrt/math.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 2433376427..82f56caaa6 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -141,7 +141,7 @@ INT CDECL MSVCRT__isnanf( float num )
  */
 float CDECL MSVCRT__logbf( float num )
 {
-    if (!finitef(num)) *MSVCRT__errno() = MSVCRT_EDOM;
+    if (isnanf(num)) *MSVCRT__errno() = MSVCRT_EDOM;
     else if (!num) *MSVCRT__errno() = MSVCRT_ERANGE;
     return logbf(num);
 }
@@ -789,7 +789,7 @@ __int64 CDECL _abs64( __int64 n )
  */
 double CDECL MSVCRT__logb(double num)
 {
-  if (!isfinite(num)) *MSVCRT__errno() = MSVCRT_EDOM;
+  if (isnan(num)) *MSVCRT__errno() = MSVCRT_EDOM;
   else if (!num) *MSVCRT__errno() = MSVCRT_ERANGE;
   return logb(num);
 }
-- 
2.13.3