Do not use the new TLS code for non-threaded builds even if USE_TLS is set

Workaround for #1761 as that exposed a problem in the new code (which was intended to speed up multithreaded code only anyway).

Author: martin-frbg

driver/others/memory.c

@@ -73,7 +73,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "common.h"
 
-#if defined(USE_TLS) 
+#if defined(USE_TLS) && defined(SMP)
 #define COMPILE_TLS
 #if defined(__GLIBC_PREREQ) 
 #if !__GLIBC_PREREQ(2,20)