Replace STRING by char* in LSTMRecognizer

Signed-off-by: NStefan Weil <sw@weilnetz.de>

src/ccmain/tessedit.cpp

@@ -175,7 +175,7 @@ bool Tesseract::init_tesseract_lang_data(
       tessedit_ocr_engine_mode == OEM_TESSERACT_LSTM_COMBINED) {
 #endif  // ndef DISABLED_LEGACY_ENGINE
     if (mgr->IsComponentAvailable(TESSDATA_LSTM)) {
-      lstm_recognizer_ = new LSTMRecognizer(language_data_path_prefix);
+      lstm_recognizer_ = new LSTMRecognizer(language_data_path_prefix.c_str());
       ASSERT_HOST(lstm_recognizer_->Load(
           this->params(), lstm_use_matrix ? language : nullptr, mgr));
     } else {

src/lstm/lstmrecognizer.cpp

@@ -47,7 +47,7 @@ const double kDictRatio = 2.25;
 // Default certainty offset to give the dictionary a chance.
 const double kCertOffset = -0.085;
 
-LSTMRecognizer::LSTMRecognizer(const STRING language_data_path_prefix)
+LSTMRecognizer::LSTMRecognizer(const char* language_data_path_prefix)
     : LSTMRecognizer::LSTMRecognizer() {
   ccutil_.language_data_path_prefix = language_data_path_prefix;
 }

src/lstm/lstmrecognizer.h

@@ -53,7 +53,7 @@ enum TrainingFlags {
 class TESS_API LSTMRecognizer {
  public:
   LSTMRecognizer();
-  LSTMRecognizer(const STRING language_data_path_prefix);
+  LSTMRecognizer(const char* language_data_path_prefix);
   ~LSTMRecognizer();
 
   int NumOutputs() const { return network_->NumOutputs(); }