[patch] Fix std::polar() test FAIL

[Jonathan Wakely]

I recently added a debug mode assertion that std::polar is not called
with a negative rho argument, which this test does.

Tested powerpc64le-linux, committed to trunk.


commit 3592c4a31ba7f3af4eb8111565888651652ad7b1
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon Jun 22 15:08:55 2015 +0100

    	* testsuite/26_numerics/complex/value_operations/1.cc: Use
    	non-negative rho argument.

diff --git a/libstdc++-v3/testsuite/26_numerics/complex/value_operations/1.cc b/libstdc++-v3/testsuite/26_numerics/complex/value_operations/1.cc
index 1caf9f1..a1e0a6b 100644
--- a/libstdc++-v3/testsuite/26_numerics/complex/value_operations/1.cc
+++ b/libstdc++-v3/testsuite/26_numerics/complex/value_operations/1.cc
@@ -53,7 +53,7 @@ void test01()
 
  complex_type e __attribute__((unused)) = conj(c);
  
- complex_type f = polar(c.imag(), 0.0);
+ complex_type f = polar(std::abs(c.imag()), 0.0);
  VERIFY( f.real() != 0 );
 }