Using arena as token array, remove arenas idea

c3_big_int.cpp

@@ -632,6 +632,10 @@ bool mul_u64_overflow(uint64_t op1, uint64_t op2, uint64_t *result)
 
 #endif
 
+// @! Big int: Maybe look into those bool operations?
+#pragma warning( push )
+#pragma warning( disable : 4804 )
+
 void bigint_add(BigInt *dest, const BigInt *op1, const BigInt *op2)
 {
   assert(dest != op1);
@@ -772,6 +776,8 @@ void bigint_add(BigInt *dest, const BigInt *op1, const BigInt *op2)
   dest->digit_count = i;
   normalize(dest);
 }
+#pragma warning( pop )
+
 
 void bigint_add_wrap(BigInt *dest, const BigInt *op1, const BigInt *op2, size_t bit_count, bool is_signed)
 {