cleanup library and some basic tests. Includes, add guards to includes
diff --git a/library/asn1parse.c b/library/asn1parse.c
index 7e8fc32..6782140 100644
--- a/library/asn1parse.c
+++ b/library/asn1parse.c
@@ -30,6 +30,8 @@
 
 #include "polarssl/asn1.h"
 
+#include <string.h>
+
 #if defined(POLARSSL_BIGNUM_C)
 #include "polarssl/bignum.h"
 #endif
@@ -37,13 +39,11 @@
 #if defined(POLARSSL_PLATFORM_C)
 #include "polarssl/platform.h"
 #else
+#include <stdlib.h>
 #define polarssl_malloc     malloc
 #define polarssl_free       free
 #endif
 
-#include <string.h>
-#include <stdlib.h>
-
 /* Implementation that should never be optimized out by the compiler */
 static void polarssl_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;