[OB PATCH] Fix compilation error with clang in gdb/testsuite/gdb.trace/tspeed.c

[Gary Benson]

Clang fails to compile the above file, with the following error:
  warning: using the result of an assignment as a condition without
  parentheses [-Wparentheses]

This prevents the following testcase from executing:
  gdb.trace/tspeed.exp
---
 gdb/testsuite/ChangeLog          | 5 +++++
 gdb/testsuite/gdb.trace/tspeed.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.trace/tspeed.c b/gdb/testsuite/gdb.trace/tspeed.c
index b2c26bb..39a6646 100644
--- a/gdb/testsuite/gdb.trace/tspeed.c
+++ b/gdb/testsuite/gdb.trace/tspeed.c
@@ -75,7 +75,7 @@
 
       /* Keep trying the speed test, with more iterations, until
 	 we get to a reasonable number.  */
-      while (problem = trace_speed_test())
+      while ((problem = trace_speed_test()))
 	{
 	  /* If iteration isn't working, give up.  */
 	  if (iters > max_iters)
-- 
1.8.3.1