Add GpFontHandler_FreeType2 to CMake

Also add stddef.h include to GpRenderedGlyphMetrics.h to make size_t
visible. Does MSVC provide size_t by default, or via stdint.h? This
prevents compilation and I can't see how this would have compiled on
Windows otherwise.

CMakeLists.txt

@@ -442,4 +442,20 @@ target_include_directories(unpacktool PRIVATE
 target_link_libraries(unpacktool PortabilityLayer MacRomanConversion)
 
 
+find_package(Freetype)
+if(FREETYPE_FOUND)
+	add_library(GpFontHandler_FreeType2 STATIC
+		GpFontHandler_FreeType2/GpFontHandler_FreeType2.cpp
+		)
+
+	target_include_directories(GpFontHandler_FreeType2 PRIVATE
+		Common
+		GpCommon
+		"${FREETYPE_INCLUDE_DIR_ft2build}"
+		)
+
+	target_link_libraries(GpFontHandler_FreeType2 PRIVATE Freetype::Freetype)
+endif()
+
+
 install (TARGETS ${EXECNAME})

GpCommon/GpRenderedGlyphMetrics.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stddef.h>
 #include <stdint.h>
 
 struct GpRenderedGlyphMetrics