Fix 2 -Wcalloc-transposed-args warnings
From gcc 14.1:
mga_dri.c: In function ‘MGADRIScreenInit’:
mga_dri.c:757:40: warning: ‘calloc’ sizes specified with ‘sizeof’ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
757 | pMGADRI = (MGADRIPtr)calloc( sizeof(MGADRIRec), 1 );
| ^~~~~~~~~
mga_dri.c:757:40: note: earlier argument should specify number of elements, later size of each element
mga_dri.c:767:22: warning: ‘calloc’ sizes specified with ‘sizeof’ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
767 | calloc( sizeof(MGADRIServerPrivateRec), 1 );
| ^~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Alan Coopersmith