misc: eliminate all those remaining gcc -Wall warnings

Reference(s):
proc/readproc.c: In function 'statm2proc'
proc/readproc.c:600:9: warning: variable 'num' set but not used [-Wunused-but-set-variable]

proc/stat.c: In function 'stat_derive_unique':
proc/stat.c:429:1: warning: no return statement in function returning non-void [-Wreturn-type]

ps/parser.c: In function 'arg_type':
ps/parser.c:1098:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
ps/parser.c:1099:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'

lib/signals.c: In function 'strtosig':
lib/signals.c:243:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
lib/signals.c:245:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'

slabtop.c: In function 'print_summary':
slabtop.c:223:29: warning: unused variable 'stats' [-Wunused-variable]

watch.c: In function 'process_ansi':
watch.c:232:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
watch.c:235:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'

Signed-off-by: Jim Warner <james.warner@comcast.net>

lib/signals.c

@@ -242,7 +242,7 @@ char *strtosig(const char *restrict s)
         numsignal = strtol(s,&endp,10);
         if(*endp || endp==s)
             free(p);
-            return NULL; /* not valid */
+        return NULL; /* not valid */
     }
     if (numsignal){
         for (i = 0; i < number_of_signals; i++){

proc/readproc.c

@@ -597,11 +597,9 @@ LEAVE(0x160);
 /////////////////////////////////////////////////////////////////////////
 
 static void statm2proc(const char* s, proc_t *restrict P) {
-    int num;
-    num = sscanf(s, "%lu %lu %lu %lu %lu %lu %lu",
+    sscanf(s, "%lu %lu %lu %lu %lu %lu %lu",
            &P->size, &P->resident, &P->share,
            &P->trs, &P->lrs, &P->drs, &P->dt);
-/*    fprintf(stderr, "statm2proc converted %d fields.\n",num); */
 }
 
 static int file2str(const char *directory, const char *what, struct utlbuf_s *ub) {

proc/stat.c

@@ -415,7 +415,7 @@ static inline void stat_cleanup_stacks_all (
 } // end: stat_cleanup_stacks_all
 
 
-static inline int stat_derive_unique (
+static inline void stat_derive_unique (
         struct hist_tic *this)
 {
     /* note: we exclude guest tics from xtot since ...

ps/parser.c

@@ -1096,7 +1096,7 @@ static int arg_type(const char *str){
   if((tmp>='a') && (tmp<='z'))   return ARG_GNU;
   if((tmp>='A') && (tmp<='Z'))   return ARG_GNU;
   if(tmp=='\0')                  return ARG_END;
-                                 return ARG_FAIL;
+  return ARG_FAIL;
 }
 
 /* First assume sysv, because that is the POSIX and Unix98 standard. */

slabtop.c

@@ -220,7 +220,6 @@ static void print_summary (void)
         tot_MIN,     tot_AVG,    tot_MAX
     };
     struct slabinfo_stack *p;
-    struct slabinfo_result *stats;
 
     if (!(p = procps_slabinfo_select(Slab_info, items, MAXTBL(items))))
         xerrx(EXIT_FAILURE, _("Error getting slab summary results"));

watch.c

@@ -232,8 +232,8 @@ static void process_ansi(FILE * fp)
     if (buf[0] == '\0')
         set_ansi_attribute(0);
 
-	for (endptr = numstart = buf; *endptr != '\0'; numstart = endptr + 1) {
-		if (!set_ansi_attribute(strtol(numstart, &endptr, 10)))
+    for (endptr = numstart = buf; *endptr != '\0'; numstart = endptr + 1) {
+        if (!set_ansi_attribute(strtol(numstart, &endptr, 10)))
             break;
         if (numstart == endptr)
             set_ansi_attribute(0); /* [m treated as [0m */