Fix an MSVC 2017 error and warnings.

Improved version by @mcostalba.

No functional change.

src/evaluate.cpp

@@ -417,7 +417,8 @@ namespace {
     // Main king safety evaluation
     if (kingAttackersCount[Them] > 1 - pos.count<QUEEN>(Them))
     {
-        int kingDanger = unsafeChecks = 0;
+        int kingDanger = 0;
+        unsafeChecks = 0;
 
         // Attacked squares defended at most once by our queen or king
         weak =  attackedBy[Them][ALL_PIECES]

src/misc.cpp

@@ -23,6 +23,11 @@
 #undef  _WIN32_WINNT
 #define _WIN32_WINNT 0x0601 // Force to include needed API prototypes
 #endif
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
 #include <windows.h>
 // The needed Windows API for processor groups could be missed from old Windows
 // versions, so instead of calling them directly (forcing the linker to resolve