jove 4.9 (displays wrong characters on MSDOS)

[Rob McMahon]

Under MSDOS, under certain circumstances using describe-command or
describe-bindings can leave jove in a state where it echoes the wrong
characters.  E.g. C-x ? C-p will report that Alt-Q is bound to previous-line.
The routines that go hunting for keys (describe-bindings, or describe-command
when it is looking to see how to access a command), can leave specialmap
turned on.  This patch to extend.c seems to fix the problem:

RCS file: extend.c,v
retrieving revision 1.1
diff -c -r1.1 extend.c
*** /tmp/,RCSt1a01895	Sat Sep 10 11:53:21 1988
--- extend.c	Sat Sep 10 11:17:12 1988
***************
*** 361,366 ****
--- 361,367 ----
  	data_obj	**prefp;
  
  #ifdef IBMPC
+ 	int oldspecialmap = specialmap;
  	specialmap = (map == miscmap);
  #endif
  
***************
*** 383,388 ****
--- 384,392 ----
  		else
  			Typeout("%-18s%s", keydescbuf, map[c1]->Name);
  	}
+ #ifdef IBMPC
+ 	specialmap = oldspecialmap;
+ #endif
  }
  
  private void
***************
*** 413,418 ****
--- 417,423 ----
  	data_obj	**prefp;
  
  #ifdef IBMPC
+ 	int oldspecialmap = specialmap;
  	specialmap = (map == miscmap);
  #endif	
  
***************
*** 445,450 ****
--- 450,458 ----
  		}
  		bufp += strlen(bufp);
  	}
+ #ifdef IBMPC
+ 	specialmap = oldspecialmap;
+ #endif
  }
  
  void
-- 
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Rob McMahon, Computing Services, Warwick University, Coventry CV4 7AL, England