[libc] Fix buildbot failures (#156733)

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
GitOrigin-RevId: d7a08c5a806fa3f59ef61d6a89ca9fff07555906

src/__support/FPUtil/bfloat16.h

diff --git a/src/__support/FPUtil/bfloat16.h b/src/__support/FPUtil/bfloat16.h
index b607fd6..13e1512 100644
--- a/src/__support/FPUtil/bfloat16.h
+++ b/src/__support/FPUtil/bfloat16.h
@@ -29,7 +29,9 @@
 
   LIBC_INLINE BFloat16() = default;
 
-  template <typename T> LIBC_INLINE constexpr explicit BFloat16(T value) {
+  template <typename T>
+  LIBC_INLINE constexpr explicit BFloat16(T value)
+      : bits(static_cast<uint16_t>(0U)) {
     if constexpr (cpp::is_floating_point_v<T>) {
       bits = fputil::cast<bfloat16>(value).bits;
     } else if constexpr (cpp::is_integral_v<T>) {