cope with partial overlap

From-SVN: r26741

libf2c/ChangeLog

+Mon May  3 11:21:35 1999  Craig Burley  <craig@jcb-sc.com>
+
+	* libF77/c_log.c: Cope with partial overlap a la z_log.c.
+	(Change likely to be made to netlib version shortly.)
+
 Mon May  3 11:12:38 1999  Craig Burley  <craig@jcb-sc.com>
 
 	Update to Netlib version of 1999-05-03:

libf2c/libF77/c_log.c

@@ -11,7 +11,7 @@ extern double f__cabs(double, double);
 void c_log(complex *r, complex *z)
 #endif
 {
-	double zi;
-	r->i = atan2(zi = z->i, z->r);
-	r->r = log( f__cabs(z->r, zi) );
+	double zi = z->i, zr = z->r;
+	r->i = atan2(zi, zr);
+	r->r = log( f__cabs( zr, zi ) );
 	}