vcl: Apple clang segfaults on "(", the "{" seems to work better

Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)

Change-Id: Ib9c8639d4c821a39afb6b071ccd6c7072e6f9e7c

vcl/source/opengl/OpenGLHelper.cxx

@@ -818,8 +818,8 @@ namespace {
 }
 
 WatchdogTimings::WatchdogTimings()
-    : maTimingValues({{6,   20} /* 1.5s,  5s */, {20, 120} /*  5s, 30s */,
-                      {60, 240} /*  15s, 60s */, {60, 240} /* 15s, 60s */})
+    : maTimingValues{{{6,   20} /* 1.5s,  5s */, {20, 120} /*  5s, 30s */,
+                      {60, 240} /*  15s, 60s */, {60, 240} /* 15s, 60s */}}
     , mbRelaxed(false)
 {
 }