Enable high-res timers on Windows

This should fix issues like #11891, caused by the fps limiting
code being unable to operate correctly.

src/CMakeLists.txt

@@ -268,7 +268,7 @@ if(WIN32)
 	else() # Probably MinGW = GCC
 		set(PLATFORM_LIBS "")
 	endif()
-	set(PLATFORM_LIBS ws2_32.lib version.lib shlwapi.lib ${PLATFORM_LIBS})
+	set(PLATFORM_LIBS ws2_32.lib version.lib shlwapi.lib winmm.lib ${PLATFORM_LIBS})
 
 	set(EXTRA_DLL "" CACHE FILEPATH "Optional paths to additional DLLs that should be packaged")
 

src/porting.cpp

@@ -35,6 +35,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	#include <algorithm>
 	#include <shlwapi.h>
 	#include <shellapi.h>
+	#include <mmsystem.h>
 #endif
 #if !defined(_WIN32)
 	#include <unistd.h>
@@ -766,6 +767,9 @@ bool open_directory(const std::string &path)
 
 inline double get_perf_freq()
 {
+	// Also use this opportunity to enable high-res timers
+	timeBeginPeriod(1);
+
 	LARGE_INTEGER freq;
 	QueryPerformanceFrequency(&freq);
 	return freq.QuadPart;