Fix char* signedness, by Andre Przywara.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3816 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/block-vpc.c b/block-vpc.c
index 87b9d69..f76c451 100644
--- a/block-vpc.c
+++ b/block-vpc.c
@@ -81,7 +81,7 @@
 
 static int vpc_probe(const uint8_t *buf, int buf_size, const char *filename)
 {
-    if (buf_size >= 8 && !strncmp(buf, "conectix", 8))
+    if (buf_size >= 8 && !strncmp((char *)buf, "conectix", 8))
 	return 100;
     return 0;
 }