add adler32 checksum algorithm

src/misc/crypt/crypt.c

@@ -322,6 +322,9 @@ const char *crypt_build_settings =
 #endif
 
     "\nVarious others: "
+#if defined(LTC_ADLER32)
+    " ADLER32 "
+#endif
 #if defined(LTC_BASE64)
     " BASE64 "
 #endif

src/misc/crypt/crypt_sizes.c

@@ -231,6 +231,10 @@ static const crypt_size _crypt_sizes[] = {
 #endif
     // sprng has no state as it uses other potentially available sources
     // like /dev/random.  See Developers Guide for more info.
+
+#ifdef LTC_ADLER32
+    _SZ_STRINGIFY_T(adler32_state),
+#endif
 };
 
 /* crypt_get_size()