Directly declare sqrtf in gcc.dg/pr51867.c

	* gcc.dg/pr51867.c: Don't include <math.h>.
	(sqrtf): Declare.

From-SVN: r184279

gcc/testsuite/ChangeLog

+2012-02-15  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* gcc.dg/pr51867.c: Don't include <math.h>.
+	(sqrtf): Declare.
+
 2012-02-15  Georg-Johann Lay  <avr@gjlay.de>
 
 	* gcc.dg/lto/20091013-1_1.c: xfail for avr.

gcc/testsuite/gcc.dg/pr51867.c

 /* { dg-do compile } */
 /* { dg-options "-O0 -fno-math-errno -fdump-rtl-expand" } */
-#include <math.h>
+
+extern float sqrtf(float);
 
 float a(float x)
 {