COMPMID-457 Fix F16 NormalizationLayer CL kernel

Change-Id: I307c7ef6a49c852615c4425dc8dc0b1066a6974f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/81895
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/src/core/CL/cl_kernels/pixelwise_mul_float.cl b/src/core/CL/cl_kernels/pixelwise_mul_float.cl
index 98127e0..f4f36a0 100644
--- a/src/core/CL/cl_kernels/pixelwise_mul_float.cl
+++ b/src/core/CL/cl_kernels/pixelwise_mul_float.cl
@@ -84,7 +84,7 @@
     // Perform multiplication
 #ifdef DATA_TYPE_FLOAT
     VEC_DATA_TYPE(DATA_TYPE_OUT, 16)
-    res = CONVERT(in1_data * in2_data * scale, VEC_DATA_TYPE(DATA_TYPE_OUT, 16));
+    res = CONVERT(in1_data * in2_data * (DATA_TYPE_RES)scale, VEC_DATA_TYPE(DATA_TYPE_OUT, 16));
 #else  /* DATA_TYPE_FLOAT */
     VEC_DATA_TYPE(DATA_TYPE_OUT, 16)
     res = CONVERT_OP_FLOAT(CONVERT_OP_FLOAT((convert_float16(in1_data * in2_data) * scale), VEC_DATA_TYPE(DATA_TYPE_RES, 16), ROUND), VEC_DATA_TYPE(DATA_TYPE_OUT, 16), ROUND);