Copy cgminer path, not cat it.
diff --git a/main.c b/main.c
index f369be4..73dd899 100644
--- a/main.c
+++ b/main.c
@@ -4495,7 +4495,7 @@ int main (int argc, char *argv[])
sigaction(SIGINT, &handler, &inthandler);
opt_kernel_path = malloc(PATH_MAX);
- strcat(opt_kernel_path, CGMINER_PREFIX);
+ strcpy(opt_kernel_path, CGMINER_PREFIX);
// Hack to make cgminer silent when called recursively on WIN32
int skip_to_bench = 0;