complex (__complex_acosh): Just use '< _Tp()'.

2011-10-28  Richard B. Kreckel  <kreckel@ginac.de>

	* include/std/complex (__complex_acosh): Just use '< _Tp()'.
	* include/tr1/complex (__complex_acosh): Likewise.

From-SVN: r180607

libstdc++-v3/ChangeLog

+2011-10-28  Richard B. Kreckel  <kreckel@ginac.de>
+
+	* include/std/complex (__complex_acosh): Just use '< _Tp()'.
+	* include/tr1/complex (__complex_acosh): Likewise.
+
 2011-10-27  Richard B. Kreckel  <kreckel@ginac.de>
 	    Paolo Carlini  <paolo.carlini@oracle.com>
 

libstdc++-v3/include/std/complex

@@ -1690,7 +1690,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 			    * (__z.real() + __z.imag()) - _Tp(1.0),
 			    _Tp(2.0) * __z.real() * __z.imag());
       __t = std::sqrt(__t);
-      if (__z.real() < _Tp(-0.0))
+      if (__z.real() < _Tp())
 	__t = -__t;
 
       return std::log(__t + __z);

libstdc++-v3/include/tr1/complex

@@ -189,7 +189,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 			    * (__z.real() + __z.imag()) - _Tp(1.0),
 			    _Tp(2.0) * __z.real() * __z.imag());
       __t = std::sqrt(__t);
-      if (__z.real() < _Tp(-0.0))
+      if (__z.real() < _Tp())
 	__t = -__t;
 
       return std::log(__t + __z);