check return values of malloc and handle error.

added some missing includes, too.

closes #199.

dbus.c

@@ -1,10 +1,14 @@
 /* copyright 2013 Sascha Kruse and contributors (see LICENSE for licensing information) */
 
+#include <stdlib.h>
+#include <stdio.h>
 #include <glib.h>
+#include <string.h>
 #include <gio/gio.h>
 #include "dunst.h"
 #include "dbus.h"
 #include "notification.h"
+#include "utils.h"
 
 GDBusConnection *dbus_conn;
 
@@ -124,6 +128,9 @@ static void onNotify(GDBusConnection * connection,
         gchar *summary = NULL;
         gchar *body = NULL;
         Actions *actions = malloc(sizeof(Actions));
+        if(actions == NULL) {
+                die("Unable to allocate memory", EXIT_FAILURE);
+        }
         gint timeout = -1;
 
         /* hints */
@@ -268,6 +275,9 @@ static void onNotify(GDBusConnection * connection,
         }
 
         notification *n = malloc(sizeof(notification));
+        if(n == NULL) {
+                die("Unable to allocate memory", EXIT_FAILURE);
+        }
         n->appname = appname;
         n->summary = summary;
         n->body = body;

dunst.c

@@ -319,6 +319,9 @@ int main(int argc, char *argv[])
 
         if (settings.startup_notification) {
                 notification *n = malloc(sizeof(notification));
+                if(n == NULL) {
+                        die("Unable to allocate memory", EXIT_FAILURE);
+                }
                 n->appname = strdup("dunst");
                 n->summary = strdup("startup");
                 n->body = strdup("dunst is up and running");

x.c

@@ -330,6 +330,9 @@ static cairo_surface_t *get_icon_surface(char *icon_path)
 static colored_layout *r_init_shared(cairo_t *c, notification *n)
 {
         colored_layout *cl = malloc(sizeof(colored_layout));
+        if(cl = NULL) {
+                die("Unable to allocate memory", EXIT_FAILURE);
+        }
         cl->l = pango_cairo_create_layout(c);
 
         if (!settings.word_wrap) {