ecore_evas: extn - restore missing symbol that resulted in a temporary ABI break.

Thanks to Albin and Debian tools to have spotted that.

- cherry-pick me -

src/Makefile_Ecore_Evas.am

@@ -18,6 +18,7 @@ lib/ecore_evas/ecore_evas_ews.c \
 lib/ecore_evas/ecore_evas_module.c \
 lib/ecore_evas/ecore_evas_private.h \
 lib/ecore_evas/ecore_evas_extn.h \
+lib/ecore_evas/ecore_evas_extn.c \
 lib/ecore_evas/ecore_evas_wayland.h \
 lib/ecore_evas/ecore_evas_win32.h \
 lib/ecore_evas/ecore_evas_x11.h \

src/lib/ecore_evas/ecore_evas.c

@@ -359,6 +359,8 @@ ecore_evas_init(void)
    _ecore_evas_ews_events_init();
 #endif
 
+   _ecore_evas_extn_init();
+
    _ecore_evas_engine_init();
 
    eina_log_timing(_ecore_evas_log_dom,
@@ -398,6 +400,9 @@ ecore_evas_shutdown(void)
    if (ecore_evas_animator) ecore_animator_del(ecore_evas_animator);
    ecore_evas_animator = NULL;
 #endif
+
+   _ecore_evas_extn_shutdown();
+
 #ifdef BUILD_ECORE_EVAS_EWS
    while (_ecore_evas_ews_shutdown());
 #endif

src/lib/ecore_evas/ecore_evas_extn.c

@@ -0,0 +1,19 @@
+#include <Ecore.h>
+#include "Ecore_Evas.h"
+
+EAPI int ECORE_EVAS_EXTN_CLIENT_ADD = 0;
+EAPI int ECORE_EVAS_EXTN_CLIENT_DEL = 0;
+
+void
+_ecore_evas_extn_init(void)
+{
+   ECORE_EVAS_EXTN_CLIENT_ADD = ecore_event_type_new();
+   ECORE_EVAS_EXTN_CLIENT_DEL = ecore_event_type_new();
+}
+
+void
+_ecore_evas_extn_shutdown(void)
+{
+   ECORE_EVAS_EXTN_CLIENT_ADD = 0;
+   ECORE_EVAS_EXTN_CLIENT_DEL = 0;
+}

src/lib/ecore_evas/ecore_evas_private.h

@@ -329,6 +329,9 @@ void _ecore_evas_ews_events_init(void);
 int _ecore_evas_ews_shutdown(void);
 #endif
 
+void _ecore_evas_extn_init(void);
+void _ecore_evas_extn_shutdown(void);
+
 Eina_Module *_ecore_evas_engine_load(const char *engine);
 const Eina_List *_ecore_evas_available_engines_get(void);
 void _ecore_evas_engine_init(void);

src/modules/ecore_evas/engines/extn/ecore_evas_extn.c

@@ -41,23 +41,14 @@ struct _Extn
 
 static Eina_List *extn_ee_list = NULL;
 
-EAPI int ECORE_EVAS_EXTN_CLIENT_ADD = 0;
-EAPI int ECORE_EVAS_EXTN_CLIENT_DEL = 0;
-
-Eina_Bool
-_ecore_evas_extn_init(void)
+static Eina_Bool
+_ecore_evas_extn_module_init(void)
 {
-   if (!ECORE_EVAS_EXTN_CLIENT_ADD)
-     {
-	ECORE_EVAS_EXTN_CLIENT_ADD = ecore_event_type_new();
-	ECORE_EVAS_EXTN_CLIENT_DEL = ecore_event_type_new();
-     }
-
    return EINA_TRUE;
 }
 
-void
-_ecore_evas_extn_shutdown(void)
+static void
+_ecore_evas_extn_module_shutdown(void)
 {
 }
 
@@ -2214,5 +2205,5 @@ _ecore_evas_extn_interface_new(void)
    return iface;
 }
 
-EINA_MODULE_INIT(_ecore_evas_extn_init);
-EINA_MODULE_SHUTDOWN(_ecore_evas_extn_shutdown);
+EINA_MODULE_INIT(_ecore_evas_extn_module_init);
+EINA_MODULE_SHUTDOWN(_ecore_evas_extn_module_shutdown);