Fix some unused variable warnings. (#352)

Also removes a prototype that wasn't needed.

src/dsk.c

@@ -2250,8 +2250,8 @@ LispPTR COM_getfreeblock(register LispPTR *args)
   register int dskp, rval, *buf;
   char lfname[MAXPATHLEN + 5], dir[MAXPATHLEN], host[MAXNAMLEN];
   char name[MAXNAMLEN + 1], file[MAXPATHLEN], ver[VERSIONLEN];
-  char drive[2];
 #ifdef DOS
+  char drive[2];
   struct diskfree_t sfsbuf;
 #else
   struct statvfs sfsbuf;
@@ -2501,7 +2501,10 @@ int unpack_filename(char *file, char *dir, char *name, char *ver, int checkp)
 int true_name(register char *path)
 {
   char dir[MAXPATHLEN];
-  char name[MAXNAMLEN], drive[1];
+  char name[MAXNAMLEN];
+#ifdef DOS
+  char drive[1];
+#endif
   register char *sp, *cp;
   register int type, c;
 
@@ -3056,8 +3059,10 @@ static int get_version_array(char *dir, char *file, FileName *varray, CurrentVAr
   register FileName *svarray;
   register DIR *dirp;
   register struct dirent *dp;
+  /* Used in commented out code below:
   register int rval;
   struct stat sbuf;
+  */
 
   /*
    * First of all, prepare a lower cased file name for the case insensitive

src/ldsout.c

@@ -52,7 +52,6 @@ int Storage_expanded; /*  T or NIL */
 /************************************************************************/
 #if defined(DOS) || defined(XWINDOW)
 #include "devif.h"
-static char *metersyms = "-\\|/";
 extern DspInterface currentdsp;
 #endif /* DOS || XWINDOW */
 
@@ -75,12 +74,10 @@ int sysout_loader(const char *sysout_file_name, int sys_size) {
 
   unsigned sysout_size; /* sysout size in page */
   struct stat stat_buf; /* file stat buf */
-  int i, vp;
+  int i;
 
   char errmsg[255];
 
-  int j = 0;
-
   /* Checks for specifying the process size (phase I) */
   /* If sys_size == 0 figure out the proper size later */
   if ((sys_size != 0) && (sys_size < DEFAULT_PRIME_SYSOUTSIZE)) {
@@ -300,7 +297,7 @@ int sysout_loader(const char *sysout_file_name, int sys_size) {
     }
     _settextposition((short)0, (short)0);
     if ((i & 0xf) == 0) {
-      for (j = 0; j < (columns * i) / (sysout_size >> 1); j++) putchar(' ');
+      for (int j = 0; j < (columns * i) / (sysout_size >> 1); j++) putchar(' ');
       printf("-=(%2d%%)=-\n", (100 * i) / (sysout_size >> 1));
     }
 #endif /* DOS */
@@ -316,9 +313,8 @@ int sysout_loader(const char *sysout_file_name, int sys_size) {
         printf("               offset was 0x%lx (0x%x pages).\n", lispworld_offset,
                GETFPTOVP(fptovp, i));
         perror("read() error was");
-        {
-          int j;
-          for (j = 0; j < 10; j++) printf(" %d: 0x%x  ", j, GETFPTOVP(fptovp, j));
+        for (int j = 0; j < 10; j++) {
+          printf(" %d: 0x%x  ", j, GETFPTOVP(fptovp, j));
         }
         free(fptovp);
         exit(-1);

src/llstk.c

@@ -215,12 +215,10 @@ out:
 */
 /******************************************************************/
 int do_stackoverflow(int incallp) {
-  register DLword *next68k;
   DLword newfx;
   DLword savenext;
   DLword *oldPVar;
   int movedistance;
-  LispPTR moveframe(register FX * oldfx68k);
 #ifdef STACKCHECK
   LispPTR stackcontents;
   LispPTR TopIVAR;
@@ -431,7 +429,7 @@ void decusecount68k(register FX *frame68k) {
   DLword *alink68k;
   register Bframe *blink68k;
   DLword *clink68k;
-  register DLword *ivar68k;
+  /*** register DLword *ivar68k; */
   register int size;
 
   if (FX_INVALIDP(frame68k)) return;
@@ -1038,14 +1036,11 @@ void check_BF(Bframe *bf68k) {
 /************************************************************************/
 
 int check_stack_rooms(FX *fx68k) {
-  int size;
-  DLword *freeptr68k, *endstk68k;
+  DLword *freeptr68k;
 
   CHECK_FX(fx68k);
   freeptr68k = Addr68k_from_StkOffset(fx68k->nextblock);
   if (!FSBP(freeptr68k)) error("check_stack_rooms:  nextblock doesn't point to an FSB");
-  /*endstk68k=freeptr68k + FSB_size(freeptr68k);
-  size=((UNSIGNED)endstk68k - (UNSIGNED)CurrentStackPTR) >> 1;*/
   return (FSB_size(freeptr68k));
 
 } /* end check_stack_rooms */