Fix instances of '#if __LP64__'.
Triggers -Wundef, which is on in -Weverything.
Bug: http://b/31496165
Change-Id: Ib06107073f7dd1d584c19c222d0430da9d35630b
diff --git a/libc/bionic/statvfs.cpp b/libc/bionic/statvfs.cpp
index 39ffb64..cd825eb 100644
--- a/libc/bionic/statvfs.cpp
+++ b/libc/bionic/statvfs.cpp
@@ -20,7 +20,7 @@
// Paper over the fact that 32-bit kernels use fstatfs64/statfs64 with an extra argument,
// but 64-bit kernels don't have the "64" bit suffix or the extra size_t argument.
-#if __LP64__
+#if defined(__LP64__)
extern "C" int __fstatfs(int, struct statfs*);
extern "C" int __statfs(const char*, struct statfs*);
# define __fstatfs64(fd,size,buf) __fstatfs(fd,buf)