Fixed findings

List of Findings

Error: CPPCHECK_WARNING (CWE-476): [#def1]
lerc-4.0.0/src/LercLib/fpl_EsriHuffman.cpp:357: warning[nullPointerOutOfMemory]: If memory allocation fails, then there is a possible null pointer dereference: originalPtr
#  355|               *ppByte = (unsigned char *)malloc (rle_len + 1);
#  356|               unsigned char * originalPtr = *ppByte ;
#  357|->             originalPtr[0] = HUFFMAN_PACKBITS;
#  358|   
#  359|               unsigned char *packed = originalPtr + 1; //NULL;

Error: CPPCHECK_WARNING (CWE-682): [#def2]
lerc-4.0.0/src/LercLib/fpl_EsriHuffman.cpp:359: error[nullPointerArithmeticOutOfMemory]: If memory allocation fails: pointer addition with NULL pointer.
#  357|               originalPtr[0] = HUFFMAN_PACKBITS;
#  358|   
#  359|->             unsigned char *packed = originalPtr + 1; //NULL;
#  360|               encodePackBits ((unsigned char *)input, input_len, &packed);
#  361|   

Error: CPPCHECK_WARNING (CWE-476): [#def3]
lerc-4.0.0/src/LercLib/fpl_EsriHuffman.cpp:370: warning[nullPointerOutOfMemory]: If memory allocation fails, then there is a possible null pointer dereference: originalPtr
#  368|           *ppByte = (unsigned char *)malloc (input_len + 1);
#  369|           unsigned char * originalPtr = *ppByte ;
#  370|->         originalPtr[0] = HUFFMAN_NO_ENCODING; // as is flag
#  371|           memcpy (originalPtr + 1, input, input_len);
#  372|   

Error: CPPCHECK_WARNING (CWE-682): [#def4]
lerc-4.0.0/src/LercLib/fpl_EsriHuffman.cpp:371: error[nullPointerArithmeticOutOfMemory]: If memory allocation fails: pointer addition with NULL pointer.
#  369|           unsigned char * originalPtr = *ppByte ;
#  370|           originalPtr[0] = HUFFMAN_NO_ENCODING; // as is flag
#  371|->         memcpy (originalPtr + 1, input, input_len);
#  372|   
#  373|           return (int)input_len + 1;

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