Hello,

here is simple fix for following warnings:

xdisp.c: In function ‘Fdump_glyph_matrix’:
xdisp.c:19320:20: error: format ‘%lld’ expects argument of type ‘long
long int’, but argument 3 has type ‘ptrdiff_t {aka long int}’
[-Werror=format=]
   fprintf (stderr, "PT = %"pI"d, BEGV = %"pI"d. ZV = %"pI"d\n",

from src/xdisp.c