e thumb - silence alignment warning - valid code

the code is right as the int array is at the start of the allocation
that should be aligned to all types anyway. but it's noise that
distracts.

src/bin/e_thumb.c

@@ -366,7 +366,7 @@ _e_thumb_gen_begin(int objid, const char *file, const char *key, int w, int h,
    //  [char[]]sig2
    //  [char[]]src2
    //  ...
-   desk = (int *)buf;
+   desk = (int *)(void *)buf;
    desk[0] = desk_x;
    desk[1] = desk_y;
    desk[2] = desk_x_count;