code style

test=develop

Author: wopeizl

paddle/fluid/memory/allocation/cpu_allocator.h

@@ -17,7 +17,8 @@
 
 #ifdef _WIN32
 #define posix_memalign_free _aligned_free
-#define posix_memalign(p, a, s) (((*(p)) = _aligned_malloc((s), (a))), *(p) ? 0 : errno)
+#define posix_memalign(p, a, s) \
+  (((*(p)) = _aligned_malloc((s), (a))), *(p) ? 0 : errno)
 #endif
 
 namespace paddle {