Fixed Visual Studio build

Moved affinity to tests
Fixed strange output from mask_to_string

src/tests/affinity.cpp

@@ -1,5 +1,6 @@
 /*
 Copyright (c) 2019, jtgrassie
+Copyright (c) 2019, tevador <tevador@gmail.com>
 
 All rights reserved.
 
@@ -26,6 +27,8 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#include <sstream>
+
 #if defined(_WIN32) || defined(__CYGWIN__)
   #include <windows.h>
 #else
@@ -95,20 +98,20 @@ cpuid_from_mask(uint64_t mask, const unsigned &thread_index)
 std::string
 mask_to_string(uint64_t mask)
 {
-    std::string r(65, '\0');
+	std::ostringstream ss;
     unsigned len = 0;
     unsigned v = 0;
     unsigned i = 64;
     while (i--)
     {
         v = mask >> i;
-        if (1ULL & v)
-        {
-            if (len == 0) len = i+1;
-            r[len-i] = '1';
-        }
-        else
-            if (len > 0) r[len-i] = '0';
+		if (1ULL & v)
+		{
+			if (len == 0) len = i + 1;
+			ss << '1';
+		}
+		else
+			if (len > 0) ss << '0';
     }
-    return r;
+    return ss.str();
 }

src/tests/benchmark.cpp

@@ -38,7 +38,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "utility.hpp"
 #include "../randomx.h"
 #include "../blake2/endian.h"
-#include "../affinity.hpp"
+#include "affinity.hpp"
 
 const uint8_t blockTemplate_[] = {
 		0x07, 0x07, 0xf7, 0xa4, 0xf0, 0xd6, 0x05, 0xb3, 0x03, 0x26, 0x08, 0x16, 0xba, 0x3f, 0x10, 0x90, 0x2e, 0x1a, 0x14,