Use delete[] after new[]

gmake: Wejście do katalogu '/usr/home/saper/sw/misskey/build'
  CXX(target) Release/obj.target/crypto_key/src/crypto_key.o
../src/crypto_key.cc:25:3: warning: 'delete' applied to a pointer that was allocated with 'new[]'; did you mean 'delete[]'?
      [-Wmismatched-new-delete]
                delete sourceBuf;
                ^
                      []
../src/crypto_key.cc:18:25: note: allocated with 'new[]' here
        const auto sourceBuf = new char[sourceLength];
                               ^
../src/crypto_key.cc:32:2: warning: 'delete' applied to a pointer that was allocated with 'new[]'; did you mean 'delete[]'?
      [-Wmismatched-new-delete]
        delete sourceBuf;
        ^
              []
../src/crypto_key.cc:18:25: note: allocated with 'new[]' here
        const auto sourceBuf = new char[sourceLength];
                               ^
2 warnings generated.

src/crypto_key.cc

@@ -22,14 +22,14 @@ NAN_METHOD(extractPublic)
 	const auto source = BIO_new_mem_buf(sourceBuf, sourceLength);
 	if (source == nullptr) {
 		Nan::ThrowError("Memory allocation failed");
-		delete sourceBuf;
+		delete[] sourceBuf;
 		return;
 	}
 
 	const auto rsa = PEM_read_bio_RSAPrivateKey(source, nullptr, nullptr, nullptr);
 
 	BIO_free(source);
-	delete sourceBuf;
+	delete[] sourceBuf;
 
 	if (rsa == nullptr) {
 		Nan::ThrowError("Decode failed");