Use safer allocation macros

Use of these macros, apart from the benefits mentioned in the commit
that adds the macros, has some other good side effects:

-  Consistency in getting the size of the object from sizeof(type),
   instead of a mix of sizeof(type) sometimes and sizeof(*p) other
   times.

-  More readable code: no casts, and no sizeof(), so also shorter lines
   that we don't need to cut.

-  Consistency in using array allocation calls for allocations of arrays
   of objects, even when the object size is 1.

Cc: Valentin V. Bartenev <vbartenev@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

libmisc/pam_pass_non_interactive.c

@@ -14,6 +14,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <security/pam_appl.h>
+
+#include "alloc.h"
 #include "prototypes.h"
 #include "shadowlog.h"
 
@@ -43,7 +45,7 @@ static int ni_conv (int num_msg,
 		return PAM_CONV_ERR;
 	}
 
-	responses = (struct pam_response *) calloc (num_msg, sizeof (*responses));
+	responses = CALLOC (num_msg, struct pam_response);
 	if (NULL == responses) {
 		return PAM_CONV_ERR;
 	}