Fix blur and 3dlut with clipped output

bug 17157250

Change-Id: I388a255380fbdd9f6b5d1c7cb9f14df6f035ae48
diff --git a/cpu_ref/rsCpuIntrinsic3DLUT.cpp b/cpu_ref/rsCpuIntrinsic3DLUT.cpp
index a7c9487..7eb0c01 100644
--- a/cpu_ref/rsCpuIntrinsic3DLUT.cpp
+++ b/cpu_ref/rsCpuIntrinsic3DLUT.cpp
@@ -63,8 +63,8 @@
                                       uint32_t instep, uint32_t outstep) {
     RsdCpuScriptIntrinsic3DLUT *cp = (RsdCpuScriptIntrinsic3DLUT *)p->usr;
 
-    uchar4 *out = (uchar4 *)p->out + xstart;
-    uchar4 *in = (uchar4 *)p->in + xstart;
+    uchar4 *out = (uchar4 *)p->out;
+    uchar4 *in = (uchar4 *)p->in;
     uint32_t x1 = xstart;
     uint32_t x2 = xend;