pkg/tinycbor: fix "uninitialized variable" warning

On ESP32 and new ESP8266 platform, the compilation of the package fails since a local variable is potentially used uninitialized. Therefore, the variable is initialized with a default value.

pkg/tinycbor/patches/0001-fix-compilation-warning-error.patch

@@ -0,0 +1,25 @@
+From d53d44a42a8e9c4c72438dd48e2663ec7f717397 Mon Sep 17 00:00:00 2001
+From: Gunar Schorcht <gunar@schorcht.net>
+Date: Sat, 19 Oct 2019 14:02:02 +0200
+Subject: [PATCH 1/1] fix compilation warning/error
+
+---
+ src/cborvalidation.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/cborvalidation.c b/src/cborvalidation.c
+index 08c3511..28b99c4 100644
+--- a/src/cborvalidation.c
++++ b/src/cborvalidation.c
+@@ -379,7 +379,7 @@ static inline CborError validate_floating_point(CborValue *it, CborType type, ui
+     CborError err;
+     int r;
+     double val;
+-    float valf;
++    float valf = 0;  /* fixes the "uninitialized variable" compiler warning */
+     uint16_t valf16;
+ 
+     if (type != CborDoubleType) {
+-- 
+2.17.1
+