replace NOTPARMDECL with TPARM_WORKAROUND

The old logic used a negative check to emit an extern declaration for
tparm(). This guarded against old platforms whose curses implementations
did not declare their own functions.

If there are still any platforms left that need this declaration, they
can set TPARM_WORKAROUND to get the old behavior back.

sys/unix/hints/include/compiler.500

@@ -49,7 +49,7 @@ endif
 #CC= clang
 #CXX=clang++ -std=gnu++11
 
-CFLAGS=$(CCFLAGS) -I../include -DNOTPARMDECL
+CFLAGS=$(CCFLAGS) -I../include
 CFLAGS+=-Wall -Wextra  \
 	-Wreturn-type -Wunused -Wformat -Wswitch -Wshadow -Wwrite-strings
 CFLAGS+=-pedantic
@@ -133,7 +133,7 @@ endif  # clang-specific ends here
 
 ifdef MAKEFILE_SRC
 ifdef CPLUSPLUS_NEEDED
-CCXXFLAGS = -g -I../include -DNOTPARMDECL
+CCXXFLAGS = -g -I../include
 CCXXFLAGS+=-Wall -Wextra -Wno-missing-field-initializers \
         -Wreturn-type -Wunused -Wformat -Wswitch -Wshadow -Wwrite-strings
 CCXXFLAGS+=-pedantic

sys/unix/hints/include/cross-pre2.500

@@ -338,8 +338,8 @@ WASM_CFLAGS += -Wshadow
 # Nethack C flags
 WASM_CFLAGS += $(WINCFLAGS)   #WINCFLAGS set from multiw-2.500
 WASM_CFLAGS += -DSYSCF -DSYSCF_FILE=\"/sysconf\" -DSECURE -DNHUUID
-#WASM_CFLAGS += -g -I../include -DNOTPARMDECL
-WASM_CFLAGS += -I../include -DNOTPARMDECL
+#WASM_CFLAGS += -g -I../include
+WASM_CFLAGS += -I../include
 # NetHack sources control
 WASM_CFLAGS += -DDLB
 WASM_CFLAGS += -DHACKDIR=\"$(HACKDIR)\"