Bug in evaluation of parameter

Input parameters for mapping are in range: [ -9 ... 0]
Incorrect evaluation occurs when 0 (no error) is passed.
Rest parameters (-1 ... -9) are OK.

No optimization. Debug configuration of project..
Compiler: ARM 5.1.7

#include <stdio.h>

int err_to_errno_table[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

#define ERR_TO_ERRNO_TABLE_SIZE ( sizeof(err_to_errno_table) / sizeof(err_to_errno_table[0]) )

int main ( void ) {

    int err_code = 0;
	
    if ( (-(err_code)) < ERR_TO_ERRNO_TABLE_SIZE ) {
        printf ( "Ok \r\n" );
    } else  {
        printf ( "Bad \r\n" );
    }

    return 0;
}