You have some false positives, e.g.
dlls/gdi32/enhmfdrv/mapping.c 1 The function EMFDRV_ModifyWorldTransform' is never used
That function is indeed used in dlls/gdi32/enhmfdrv/init.c; the struct EMFDRV_Funcs is initialized with it. I guess cppcheck doesn't grok function pointers yet? - Dan