Add NT_FreeCharArray.

src/ntcore_c.cpp

@@ -481,6 +481,7 @@ struct NT_String *NT_AllocateStringArray(size_t size) {
   return retVal;
 }
 
+void NT_FreeCharArray(char *v_char) { std::free(v_char); }
 void NT_FreeDoubleArray(double *v_double) { std::free(v_double); }
 void NT_FreeBooleanArray(int *v_boolean) { std::free(v_boolean); }
 void NT_FreeStringArray(struct NT_String *v_string, size_t arr_size) {