MLECO-1868: Code static analyzer warnings fixes

Signed-off-by: alexander <alexander.efremov@arm.com>
Change-Id: Ie423e9cad3fabec6ab077ded7236813fe4933dea
diff --git a/source/use_case/kws_asr/include/Wav2LetterMfcc.hpp b/source/use_case/kws_asr/include/Wav2LetterMfcc.hpp
index 0852cbf..75d75da 100644
--- a/source/use_case/kws_asr/include/Wav2LetterMfcc.hpp
+++ b/source/use_case/kws_asr/include/Wav2LetterMfcc.hpp
@@ -60,8 +60,8 @@
         bool ApplyMelFilterBank(
                 std::vector<float>&                 fftVec,
                 std::vector<std::vector<float>>&    melFilterBank,
-                std::vector<int32_t>&               filterBankFilterFirst,
-                std::vector<int32_t>&               filterBankFilterLast,
+                std::vector<uint32_t>&              filterBankFilterFirst,
+                std::vector<uint32_t>&              filterBankFilterLast,
                 std::vector<float>&                 melEnergies) override;
 
         /**
@@ -103,6 +103,7 @@
                 const float&   leftMel,
                 const float&   rightMel,
                 bool     useHTKMethod) override;
+
     };
 
 } /* namespace audio */