Use #ifndef instead of #if !defined

[stockfish] / src / bitcount.h

diff --git a/src/bitcount.h b/src/bitcount.h
index 2300bc96452cef857a819b7ab73b3ddbe8f2cf3e..ad8df94ab078522066fdfa44da80c931fa732c88 100644 (file)
--- a/src/bitcount.h
+++ b/src/bitcount.h
@@ -18,7 +18,7 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if !defined(BITCOUNT_H_INCLUDED)
+#ifndef BITCOUNT_H_INCLUDED
 #define BITCOUNT_H_INCLUDED
 
 #include <cassert>
@@ -81,7 +81,7 @@ inline int popcount<CNT_32_MAX15>(Bitboard b) {
 template<>
 inline int popcount<CNT_HW_POPCNT>(Bitboard b) {
 
-#if !defined(USE_POPCNT)
+#ifndef USE_POPCNT
 
   assert(false);
   return b != 0; // Avoid 'b not used' warning
@@ -102,4 +102,4 @@ inline int popcount<CNT_HW_POPCNT>(Bitboard b) {
 #endif
 }
 
-#endif // !defined(BITCOUNT_H_INCLUDED)
+#endif // #ifndef BITCOUNT_H_INCLUDED