Do not check for non NULL pointer before HeapFree'ing it. It's
redundant.

diff --git a/dlls/msvcrt/main.c b/dlls/msvcrt/main.c
index ab7d2d7..4297bb8 100644
--- a/dlls/msvcrt/main.c
+++ b/dlls/msvcrt/main.c
@@ -68,7 +68,7 @@
   case DLL_THREAD_DETACH:
     /* Free TLS */
     tls = TlsGetValue(msvcrt_tls_index);
-    if (tls) HeapFree(GetProcessHeap(), 0, tls);
+    HeapFree(GetProcessHeap(), 0, tls);
     TRACE("finished thread free\n");
     break;
   }