Better definition fix

Author: Andras Fekete

include/wolfengine/we_internal.h

@@ -138,6 +138,14 @@ WOLFENGINE_LOCAL void *we_memdup(const void *data, size_t siz);
     #define WE_PRINTF_FUNC(s, v)
 #endif
 
+#ifndef AES_BLOCK_SIZE
+    #ifdef WC_NO_COMPAT_AES_BLOCK_SIZE
+        #define AES_BLOCK_SIZE WC_AES_BLOCK_SIZE
+    #else
+        #error AES_BLOCK_SIZE not defined when it should be
+    #endif
+#endif
+
 /*
  * Global random
  */