Apply suggestions from code review

Co-authored-by: Georgi Gerganov <[email protected]>

Author: ulatekh

whisper.cpp

@@ -1384,9 +1384,10 @@ static bool whisper_model_load(struct whisper_model_loader * loader, whisper_con
             }
 
             // If requested, output all text as lowercase.
-            if (wctx.params.fold_lowercase)
+            if (wctx.params.fold_lowercase) {
                 std::transform(word.begin(), word.end(), word.begin(),
                     [](unsigned char c) { return std::tolower(c); });
+            }
 
             vocab.token_to_id[word] = i;
             vocab.id_to_token[i] = word;

whisper.h

@@ -116,7 +116,7 @@ extern "C" {
         int   gpu_device;  // CUDA device
 
         // Fold language tokens to lowercase
-        bool fold_lowercase;
+        bool vocab_lc;
 
         // [EXPERIMENTAL] Token-level timestamps with DTW
         bool dtw_token_timestamps;