kvazaar: fix build with gcc 7

Add upstream fix for a gcc 7 -Werror build failure.

Fixes:
http://autobuild.buildroot.net/results/ea1/ea1495696a0e810adb6695dad6b9f3d3363e81d5/
http://autobuild.buildroot.net/results/2c1/2c1fba63553afa735c5ac29d7f5de8368c794628/
http://autobuild.buildroot.net/results/d07/d07bfcb8efcb76cdea3c66e0cc24728f418e3872/

Cc: Alexandre Esse <alexandre.esse.dev@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/kvazaar/0001-Modify-and-use-FILL_ARRAY-macro-to-prevent-warning-o.patch

@@ -0,0 +1,56 @@
+From 47a9f0de049e77e866ea5bdd4bc7c795ea6dd641 Mon Sep 17 00:00:00 2001
+From: Ari Lemmetti <ari.lemmetti@gmail.com>
+Date: Tue, 11 Apr 2017 12:57:22 +0300
+Subject: [PATCH] Modify and use FILL_ARRAY macro to prevent warning on GCC 7
+
+Following warning was given and is false positive
+
+error: 'memset' used with length equal to number of elements without multiplication by element size [-Werror=memset-elt-size]
+
+Signed-off-by: Baruch Siach <baruch@tkos.co.il>
+---
+Upstream commit 47a9f0de049e7.
+
+ src/global.h | 6 +++++-
+ src/rdo.c    | 8 ++++----
+ 2 files changed, 9 insertions(+), 5 deletions(-)
+
+diff --git a/src/global.h b/src/global.h
+index bedcd49c2e02..518167443f35 100644
+--- a/src/global.h
++++ b/src/global.h
+@@ -219,7 +219,11 @@ typedef int16_t coeff_t;
+ // Fill a structure or a static array with val bytes.
+ #define FILL(var, val) memset(&(var), (val), sizeof(var))
+ // Fill a number of elements in an array with val bytes.
+-#define FILL_ARRAY(ar, val, size) memset((ar), (val), (size) * sizeof(*(ar)))
++#define FILL_ARRAY(ar, val, size) \
++{\
++  void *temp_ptr = (void*)(ar);\
++  memset((temp_ptr), (val), (size) * sizeof(*(ar)));\
++}
+ 
+ #define FREE_POINTER(pointer) { free((void*)pointer); pointer = NULL; }
+ #define MOVE_POINTER(dst_pointer,src_pointer) { dst_pointer = src_pointer; src_pointer = NULL; }
+diff --git a/src/rdo.c b/src/rdo.c
+index 52305fd72fab..2579f2808441 100644
+--- a/src/rdo.c
++++ b/src/rdo.c
+@@ -558,10 +558,10 @@ void kvz_rdoq(encoder_state_t * const state, coeff_t *coef, coeff_t *dest_coeff,
+   // Explicitly tell the only possible numbers of elements to be zeroed.
+   // Hope the compiler is able to utilize this information.
+   switch (cg_num) {
+-    case  1: memset(sig_coeffgroup_flag, 0,  1 * sizeof(sig_coeffgroup_flag[0])); break;
+-    case  4: memset(sig_coeffgroup_flag, 0,  4 * sizeof(sig_coeffgroup_flag[0])); break;
+-    case 16: memset(sig_coeffgroup_flag, 0, 16 * sizeof(sig_coeffgroup_flag[0])); break;
+-    case 64: memset(sig_coeffgroup_flag, 0, 64 * sizeof(sig_coeffgroup_flag[0])); break;
++    case  1: FILL_ARRAY(sig_coeffgroup_flag, 0,  1); break;
++    case  4: FILL_ARRAY(sig_coeffgroup_flag, 0,  4); break;
++    case 16: FILL_ARRAY(sig_coeffgroup_flag, 0, 16); break;
++    case 64: FILL_ARRAY(sig_coeffgroup_flag, 0, 64); break;
+     default: assert(0 && "There should be 1, 4, 16 or 64 coefficient groups");
+   }
+ 
+-- 
+2.13.2
+