sysutils/scanmem: use correct types for parameters in ptrace(2) calls

Clang 15 is now very strict about these bugs and would no longer accept
such broken code.

Reported by:	pkg-fallout

sysutils/scanmem/files/patch-ptrace.c

@@ -14,6 +14,42 @@
 
  #include <time.h>
  #include <sys/types.h>
+@@ -94,7 +96,7 @@ bool sm_attach(pid_t target)
+     int status;
+
+     /* attach to the target application, which should cause a SIGSTOP */
+-    if (ptrace(PTRACE_ATTACH, target, NULL, NULL) == -1L) {
++    if (ptrace(PTRACE_ATTACH, target, NULL, 0) == -1L) {
+         show_error("failed to attach to %d, %s\n", target, strerror(errno));
+         return false;
+     }
+@@ -117,7 +119,7 @@ bool sm_attach(pid_t target)
+ bool sm_detach(pid_t target)
+ {
+     // addr is ignored on Linux, but should be 1 on FreeBSD in order to let the child process continue execution where it had been interrupted
+-    return ptrace(PTRACE_DETACH, target, 1, 0) == 0;
++    return ptrace(PTRACE_DETACH, target, (caddr_t)1, 0) == 0;
+ }
+
+
+@@ -184,7 +186,7 @@ extern inline bool sm_peekdata(pid_t pid, const void *
+     for (i = 0; i < missing_bytes; i += sizeof(long))
+     {
+         const char *ptrace_address = peekbuf.base + peekbuf.size;
+-        long ptraced_long = ptrace(PTRACE_PEEKDATA, pid, ptrace_address, NULL);
++        long ptraced_long = ptrace(PTRACE_PEEKDATA, pid, ptrace_address, 0);
+
+         /* check if ptrace() succeeded */
+         if (EXPECT(ptraced_long == -1L && errno != 0, false)) {
+@@ -195,7 +197,7 @@ extern inline bool sm_peekdata(pid_t pid, const void *
+                 for (j = 1, errno = 0; j < sizeof(long); j++, errno = 0) {
+
+                     /* try for a shifted ptrace - 'continue' (i.e. try an increased shift) if it fails */
+-                    if ((ptraced_long = ptrace(PTRACE_PEEKDATA, pid, ptrace_address - j, NULL)) == -1L && 
++                    if ((ptraced_long = ptrace(PTRACE_PEEKDATA, pid, ptrace_address - j, 0)) == -1L && 
+                         (errno == EIO || errno == EFAULT))
+                             continue;
+
 @@ -406,7 +408,7 @@ bool sm_checkmatches(globals_t *vars,
      return sm_detach(vars->target);
  }
@@ -50,3 +86,12 @@
  bool sm_write_array(pid_t target, void *addr, const void *data, int len)
  {
      int i,j;
+@@ -735,7 +737,7 @@ bool sm_write_array(pid_t target, void *addr, const vo
+             for(j = 0; j <= sizeof(long) - (len - i); ++j)
+             {
+                 errno = 0;
+-                if(((peek_value = ptrace(PTRACE_PEEKDATA, target, addr - j, NULL)) == -1L) && (errno != 0))
++                if(((peek_value = ptrace(PTRACE_PEEKDATA, target, addr - j, 0)) == -1L) && (errno != 0))
+                 {
+                     if (errno == EIO || errno == EFAULT) /* may try next shift */
+                         continue;