Windows compilation fix

Author: timothyschoen

Libraries/CMakeLists.txt

@@ -24,7 +24,10 @@ set(WEBP_BUILD_EXTRAS OFF CACHE BOOL "")     # Disable all extra utilities
 set(WEBP_ENABLE_LIBWEBPMUX OFF CACHE BOOL "") # no metadata muxing
 set(WEBP_ENABLE_LIBWEBPDEMUX OFF CACHE BOOL "") # no metadata demuxing
 add_subdirectory(libwebp) # for reading webp files
-
+if(MSVC)
+    target_compile_options(webpdecoder PUBLIC "/MT$<$<STREQUAL:$<CONFIGURATION>,Debug>:d>")
+    set_target_properties(webpdecoder PROPERTIES CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>$" )
+endif()
 if(ENABLE_XZ)
     _message(STATUS "Configuring liblzma")
     add_subdirectory(xz) # for decompressing .tar.xz