Fix up VS 15 build.

Fix warnings
 Take advantage of native snprintf on VS 15

CMakeLists.txt

@@ -14,7 +14,7 @@
 # 3. Run cmake to generate project files for Windows, add more options to enable required third-party libraries.
 #    See thirdparty.inc for more information.
 #        sample command: cmake -G "Visual Studio 12 Win64" -DGFLAGS=1 -DSNAPPY=1 -DJEMALLOC=1 ..
-#        OR for VS Studio 15 cmake -G "Visual Studio 12 Win64" -DGFLAGS=1 -DSNAPPY=1 -DJEMALLOC=1 ..
+#        OR for VS Studio 15 cmake -G "Visual Studio 14 Win64" -DGFLAGS=1 -DSNAPPY=1 -DJEMALLOC=1 ..
 # 4. Then build the project in debug mode (you may want to add /m[:<N>] flag to run msbuild in <N> parallel threads
 #                                          or simply /m ot use all avail cores)
 #        msbuild rocksdb.sln

port/win/port_win.h

@@ -42,11 +42,6 @@
 #define strcasecmp _stricmp
 #endif
 
-// defined in stdio.h
-#ifndef snprintf
-#define snprintf _snprintf
-#endif
-
 #undef GetCurrentTime
 #undef DeleteFile
 
@@ -108,6 +103,9 @@ const size_t kMaxSizet = std::numeric_limits<size_t>::max();
 
 #else //_MSC_VER
 
+// VS 15 has snprintf
+#define snprintf _snprintf
+
 #define ROCKSDB_NOEXCEPT
 // std::numeric_limits<size_t>::max() is not constexpr just yet
 // therefore, use the same limits
@@ -245,13 +243,6 @@ extern void InitOnce(OnceType* once, void (*initializer)());
 
 #define CACHE_LINE_SIZE 64U
 
-#ifdef min
-#undef min
-#endif
-#ifdef max
-#undef max
-#endif
-
 // For Thread Local Storage abstraction
 typedef DWORD pthread_key_t;
 

tools/db_stress.cc

@@ -610,7 +610,8 @@ class Stats {
             "", bytes_mb, rate, (100*writes_)/done_, done_);
     fprintf(stdout, "%-12s: Wrote %ld times\n", "", writes_);
     fprintf(stdout, "%-12s: Deleted %ld times\n", "", deletes_);
-    fprintf(stdout, "%-12s: Single deleted %ld times\n", "", single_deletes_);
+    fprintf(stdout, "%-12s: Single deleted %" ROCKSDB_PRIszt " times\n", "",
+           single_deletes_);
     fprintf(stdout, "%-12s: %ld read and %ld found the key\n", "",
             gets_, founds_);
     fprintf(stdout, "%-12s: Prefix scanned %ld times\n", "", prefixes_);