declare function as float, not double.

[unix-history] / usr / src / usr.bin / f77 / libF77 / r_sqrt.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
*      @(#)r_sqrt.c    5.2     %G%
*/

float r_sqrt(x)
float *x;
{
double sqrt();
return( sqrt(*x) );
}