misc/deco: fix build with -fno-common (clang 11 and gcc 10)

PORTREVISION not bumped as it fixes build for FreeBSD 13.

Reported by:	pkg-fallout

misc/deco/files/patch-env.h

@@ -0,0 +1,8 @@
+--- env.h.orig	1997-07-12 16:29:23 UTC
++++ env.h
+@@ -1,4 +1,4 @@
+-char **EnvVector;
++static char **EnvVector;
+ void EnvInit (char **env);
+ char *EnvGet (char *name);
+ void EnvPut (char *name, char *value);

misc/deco/files/patch-scr.c

@@ -1,5 +1,15 @@
-Index: scr.c
-@@ -167,7 +167,7 @@
+--- scr.c.orig	1998-12-29 16:57:11 UTC
++++ scr.c
+@@ -148,7 +148,7 @@ WINDOW VScreen;
+ int BlackWhite = 0;
+ int ColorMode = 1;
+ int GraphMode = 1;
+-int TtyUpperCase = 0;
++extern int TtyUpperCase;
+
+ static WINDOW curscr;
+ static scrool, rscrool;
+@@ -167,7 +167,7 @@ static char *KS, *KE;
 
  static char *CL, *CM, *SE, *SO, *TE, *TI, *VE, *VS,
  	*AL, *DL, *IS, *IF, *FS, *MD, *MH, *ME, *MR,
@@ -8,15 +18,15 @@ Index: scr.c
  static NF, NB;
  static char MS, C2;
 
-@@ -231,6 +231,7 @@
+@@ -231,6 +231,7 @@ struct CapTab outtab [] = {
  	{ "Cs", CAPSTR, 0, 0, 0, &Cs, },
  	{ "Ce", CAPSTR, 0, 0, 0, &Ce, },
  	{ "Ct", CAPSTR, 0, 0, 0, &Ct, },
 +	{ "op", CAPSTR, 0, 0, 0, &OP, },
  	{ { 0, 0, }, 0, 0, 0, 0, 0, },
  };
 
-@@ -413,6 +414,8 @@
+@@ -413,6 +414,8 @@ void VClose ()
  		tputs (TE);
  	if (KE)
  		tputs (KE);
@@ -25,7 +35,7 @@ Index: scr.c
  	VFlush ();
  	TtyReset ();
  }
-@@ -425,6 +428,8 @@
+@@ -425,6 +428,8 @@ void VRestore ()
  		tputs (VE);
  	if (KE)
  		tputs (KE);

misc/deco/files/patch-tty.c

@@ -0,0 +1,11 @@
+--- tty.c.orig	1997-07-18 14:58:32 UTC
++++ tty.c
+@@ -82,7 +82,7 @@ static struct ltchars oldchars, newchars;
+ #   define OXTABS TAB3
+ #endif
+
+-int TtyUpperCase;
++int TtyUpperCase = 0;
+
+ #define NOCHAR 0
+