Fix build error without scrypt enabled.
diff --git a/ocl.c b/ocl.c
index 5fe7b1b..e71b9cc 100644
--- a/ocl.c
+++ b/ocl.c
@@ -536,8 +536,10 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
if (clState->goffset)
strcat(binaryfilename, "g");
if (opt_scrypt) {
+#ifdef USE_SCRYPT
sprintf(numbuf, "lg%dtc%d", cgpu->lookup_gap, cgpu->thread_concurrency);
strcat(binaryfilename, numbuf);
+#endif
} else {
sprintf(numbuf, "v%d", clState->vwidth);
strcat(binaryfilename, numbuf);