remove warning
diff --git a/skeletons/tests/check-PER.c b/skeletons/tests/check-PER.c
index 9fc0258..9d06a2e 100644
--- a/skeletons/tests/check-PER.c
+++ b/skeletons/tests/check-PER.c
@@ -71,7 +71,7 @@
z = per_get_few_bits(&pos, 24);
assert(z == 14443711);
- pos.buffer = "\001";
+ pos.buffer = (unsigned char *)"\001";
pos.nboff = 7;
pos.nbits = 7;
z = per_get_few_bits(&pos, 1);
@@ -79,7 +79,7 @@
assert(pos.nbits == 7);
assert(z == -1);
- pos.buffer = "\001";
+ pos.buffer = (unsigned char *)"\001";
pos.nboff = 7;
pos.nbits = 8;
z = per_get_few_bits(&pos, 1);
@@ -87,7 +87,7 @@
assert(pos.nbits == 8);
assert(z == 1);
- pos.buffer = "\000";
+ pos.buffer = (unsigned char *)"\000";
pos.nboff = 7;
pos.nbits = 8;
z = per_get_few_bits(&pos, 1);
@@ -99,7 +99,7 @@
assert(pos.nbits == 8);
assert(z == -1);
- pos.buffer = "\000";
+ pos.buffer = (unsigned char *)"\000";
pos.nboff = 7;
pos.nbits = 9;
z = per_get_few_bits(&pos, 1);
@@ -111,7 +111,7 @@
assert(pos.nbits == 1);
assert(z == 0);
- pos.buffer = "\001";
+ pos.buffer = (unsigned char *)"\001";
pos.nboff = 7;
pos.nbits = 9;
z = per_get_few_bits(&pos, 1);