Fix instances of '#if __LP64__'.
Triggers -Wundef, which is on in -Weverything.
Bug: http://b/31496165
Change-Id: Ib06107073f7dd1d584c19c222d0430da9d35630b
diff --git a/libc/bionic/strtold.cpp b/libc/bionic/strtold.cpp
index 5616cf7..c55dd61 100644
--- a/libc/bionic/strtold.cpp
+++ b/libc/bionic/strtold.cpp
@@ -32,7 +32,7 @@
extern "C" int __strtorQ(const char*, char**, int, void*);
long double strtold(const char* s, char** end_ptr) {
-#if __LP64__
+#if defined(__LP64__)
long double result;
__strtorQ(s, end_ptr, FLT_ROUNDS, &result);
return result;