Declare buffers closer to where needed.

optfunc.c

@@ -166,7 +166,6 @@ opt_j(type, s)
  char *s;
 {
  PARG parg;
- char buf[24];
  int len;
  int err;
 
@@ -201,7 +200,7 @@ opt_j(type, s)
  error("Position target at screen line %d", &parg);
  } else
  {
-
+ char buf[24];
  SNPRINTF1(buf, sizeof(buf), ".%06ld", jump_sline_fraction);
  len = (int) strlen(buf);
  while (len > 2 && buf[len-1] == '0')
@@ -231,7 +230,6 @@ opt_shift(type, s)
  char *s;
 {
  PARG parg;
- char buf[24];
  int len;
  int err;
 
@@ -266,7 +264,7 @@ opt_shift(type, s)
  error("Horizontal shift %d columns", &parg);
  } else
  {
-
+ char buf[24];
  SNPRINTF1(buf, sizeof(buf), ".%06ld", shift_count_fraction);
  len = (int) strlen(buf);
  while (len > 2 && buf[len-1] == '0')
@@ -1021,7 +1019,7 @@ opt_header(type, s)
  break;
  case QUERY:
  {
- char buf[16];
+ char buf[2*INT_STRLEN_BOUND(int)+2];
  PARG parg;
  SNPRINTF2(buf, sizeof(buf), "%d,%d", header_lines, header_cols);
  parg.p_string = buf;