Fix a comment typo

common/rdm/VariableFieldSizeCalculator.cpp

@@ -69,7 +69,7 @@ VariableFieldSizeCalculator::calculator_state
     return data_size > m_fixed_size_sum ? TOO_LARGE : FIXED_SIZE;
 
   // we know there is only one, now we need to work out the number of
-  // repeatitions or length if it's a string
+  // repetitions or length if it's a string
   unsigned int bytes_remaining = data_size - m_fixed_size_sum;
   if (variable_string_field_count) {
     // variable string