[Bug 38337] clang compiling warnings

https://bugs.winehq.org/show_bug.cgi?id=38337

--- Comment #23 from Sergey Isakov  ---
/Volumes/MacHD/Users/sergey/Documents/Projects/wine/dlls/gdi32/freetype.c:841:53:
warning: incompatible pointer types passing 'SInt16 *' (aka 'short *') to
parameter of type 'ResFileRefNum *' (aka 'int *')
[-Wincompatible-pointer-types]
    s = FSOpenResourceFile(&ref, 0, NULL, fsRdPerm, &res_ref);
                                                    ^~~~~~~~
~~~~~~~~~~~~~~~~~~

The variable is local and defined as SInt16. This is the error! 
There must be
SInt32 res_ref = 0;
I prefer also initialize it.