puzzles: fix uninitialized variable compiler error

In tree234.c, change a while() loop to a for() loop so
that the compiler will realize we loop at least once.

(From OE-Core rev: 631cd6f9144fa5dd3a36480905d6edc9b5e81520)

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-sato/puzzles/files/fix-ki-uninitialized.patch

@@ -0,0 +1,25 @@
+puzzles: avoid compiler unitialized variable error
+
+The compiler does not realize that we must go through the while()
+loop at least once, so we replace it with a for() loop.
+
+Upstream-Status: Pending
+
+Signed-off-by: Joe Slater <joe.slater@windriver.com>
+
+--- a/tree234.c
++++ b/tree234.c
+@@ -326,8 +326,11 @@ static void *add234_internal(tree234 *t,
+ 	return orig_e;
+     }
+ 
+-    n = t->root;
+-    while (n) {
++    /*
++     * We know t->root is not NULL.  The logic
++     * to break out of this is at the end of the loop.
++     */
++    for (n = t->root;;) {
+ 	LOG(("  node %p: %p/%d \"%s\" %p/%d \"%s\" %p/%d \"%s\" %p/%d\n",
+ 	     n,
+ 	     n->kids[0], n->counts[0], n->elems[0],

meta/recipes-sato/puzzles/puzzles_git.bb

@@ -14,6 +14,7 @@ SRC_URI = "git://git.tartarus.org/simon/puzzles.git \
            file://0001-palisade-Fix-warnings-with-clang-on-arm.patch \
            file://0001-Use-Wno-error-format-overflow-if-the-compiler-suppor.patch \
            file://0001-pattern.c-Change-string-lenght-parameter-to-be-size_.patch \
+           file://fix-ki-uninitialized.patch \
            "
 
 UPSTREAM_CHECK_COMMITS = "1"