New usage of _THREAD_SAFE define to indicated threaded calls are needed

src/sbbs3/GNUmakefile

@@ -75,7 +75,6 @@ DELETE	=	rm -f
 CFLAGS	+=	-DJAVASCRIPT -I../../include/mozilla/js -I$(XPDEV) -I$(UIFC)
 
 ifdef BSD	# BSD
- CFLAGS	+=	-D_THREAD_SAFE
  # Math libraries needed and uses pthread
  LFLAGS	:=	-lm -pthread -lutil
 else			# Linux / Other UNIX

src/sbbs3/sbbsdefs.mk

@@ -4,4 +4,4 @@
 
 # $Id$
 
-SBBSDEFS=	-DSBBS -DSBBS_EXPORTS -DSMB_EXPORTS -DWRAPPER_EXPORTS
+SBBSDEFS=	-DSBBS -DSBBS_EXPORTS -DSMB_EXPORTS -DWRAPPER_EXPORTS -D_THREAD_SAFE

src/sbbs3/scfg/GNUmakefile

@@ -45,7 +45,7 @@ DELETE	=	rm -f
 OUTLIB	=	-o
 
 CFLAGS	+=	-MMD
-CFLAGS	+=	-Wall -I$(UIFC) -I$(XPDEV) -I../  -D_THREAD_SAFE
+CFLAGS	+=	-Wall -I$(UIFC) -I$(XPDEV) -I../
 
 LFLAGS	:=	-L/usr/local/lib