pw_bytes: Fix static analysis complaint in test

Change-Id: Id8085cd913d263413ac911ec9d92d188e2f3169e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31620
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Prashanth Swaminathan <prashanthsw@google.com>
diff --git a/pw_bytes/endian_test.cc b/pw_bytes/endian_test.cc
index 08ae244..7b49ee7 100644
--- a/pw_bytes/endian_test.cc
+++ b/pw_bytes/endian_test.cc
@@ -264,7 +264,7 @@
 
 TEST(ReadInOrder, BoundsChecking_Ok) {
   constexpr auto buffer = Array<1, 2, 3, 4>();
-  uint16_t value;
+  uint16_t value = 0;
   EXPECT_TRUE(ReadInOrder(std::endian::little, buffer, value));
   EXPECT_EQ(0x0201, value);
 }