gcc.dg/pr97750.c: fix llp64 warnings

Signed-off-by: Jonathan Yong <10walls@gmail.com>

gcc/testsuite/ChangeLog:
	* gcc.dg/pr97750.c: make llp64 warnings consistent with lp64
diff --git a/gcc/testsuite/gcc.dg/pr97750.c b/gcc/testsuite/gcc.dg/pr97750.c
index ff0d436..e5f8e88 100644
--- a/gcc/testsuite/gcc.dg/pr97750.c
+++ b/gcc/testsuite/gcc.dg/pr97750.c
@@ -13,7 +13,7 @@
 void CopyFromUswc(long src_pitch) {
   char *dst;
   for (; CopyFromUswc_height;) {
-    unsigned unaligned = (long)CopyFromUswc_src;
+    unsigned unaligned = (__INTPTR_TYPE__)CopyFromUswc_src;
     if (unaligned)
       CopyPlane(&dst[unaligned]);  
     CopyFromUswc_src += src_pitch;