Avoid seg fault when no output exists

When no output object such like HDMI,
Window Manager crashes on initialize.
This patch avoid crashes but no care for hot plug of display.

Bug-AGL : SPEC-2136

Change-Id: I30bad0377d0ac646cead0bba1f1ae35952e3fb07
Signed-off-by: Kazumasa Mitsunari <knimitz@witz-inc.co.jp>

1 files changed, 13 insertions, 7 deletions

diff --git a/src/window_manager.cpp b/src/window_manager.cpp
index e9cc53a..28692ca 100644
--- a/src/window_manager.cpp
+++ b/src/window_manager.cpp
@@ -194,13 +194,19 @@ int WindowManager::init()
             this->controller->chooks = &this->chooks;
 
             // This protocol needs the output, so lets just add our mapping here...
-            this->controller->add_proxy_to_id_mapping(
-                this->outputs.front()->proxy.get(),
-                wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
-                    this->outputs.front()->proxy.get())));
-
-            // Create screen
-            this->controller->create_screen(this->outputs.front()->proxy.get());
+            if(!this->outputs.empty()) {
+                // FIXME : Work around to avoid signal 11. Window Manager can't handle hotplug.
+                this->controller->add_proxy_to_id_mapping(
+                    this->outputs.front()->proxy.get(),
+                    wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
+                        this->outputs.front()->proxy.get())));
+
+                // Create screen
+                this->controller->create_screen(this->outputs.front()->proxy.get());
+            }
+            else {
+                HMI_WARNING("wm", "No output object. Window Manager can't handle screen");
+            }
 
             // Set display to controller
             this->controller->display = this->display;