build: Make ImHex fully compile with warnings enabled in MSVC

plugins/diffing/CMakeLists.txt

@@ -8,6 +8,9 @@ else()
     set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
     add_subdirectory(${THIRD_PARTY_LIBS_FOLDER}/edlib ${CMAKE_CURRENT_BINARY_DIR}/edlib EXCLUDE_FROM_ALL)
     enableUnityBuild(edlib)
+    if (MSVC)
+        target_compile_options(edlib PRIVATE /wd4244)
+    endif ()
 endif()
 
 add_imhex_plugin(