[libc][math] Fix buildbot fails (llvm#151186)

Signed-off-by: Krishna Pandey <[email protected]>
Co-authored-by: OverMighty <[email protected]>

Author: krishna2803

libc/src/__support/FPUtil/cast.h

@@ -66,8 +66,9 @@ cast(InType x) {
         cpp::max(OutFPBits::FRACTION_LEN, InFPBits::FRACTION_LEN);
     DyadicFloat<cpp::bit_ceil(MAX_FRACTION_LEN)> xd(x);
     return xd.template as<OutType, /*ShouldSignalExceptions=*/true>();
-  } else
+  } else {
     return static_cast<OutType>(x);
+  }
 }
 
 } // namespace LIBC_NAMESPACE::fputil