Fix dependency issue in memory_buffer_alloc
diff --git a/library/memory_buffer_alloc.c b/library/memory_buffer_alloc.c
index 6edf207..00ac3f1 100644
--- a/library/memory_buffer_alloc.c
+++ b/library/memory_buffer_alloc.c
@@ -37,10 +37,10 @@
 
 #if defined(POLARSSL_MEMORY_DEBUG)
 #include <stdio.h>
+#endif
 #if defined(POLARSSL_MEMORY_BACKTRACE)
 #include <execinfo.h>
 #endif
-#endif
 
 #if defined(POLARSSL_THREADING_C)
 #include "polarssl/threading.h"