input: check malloc return

include/vlc_input.h

@@ -53,6 +53,8 @@ struct seekpoint_t
 static inline seekpoint_t *vlc_seekpoint_New( void )
 {
     seekpoint_t *point = (seekpoint_t*)malloc( sizeof( seekpoint_t ) );
+    if( !point )
+        return NULL;
     point->i_byte_offset =
     point->i_time_offset = -1;
     point->psz_name = NULL;
@@ -96,6 +98,8 @@ typedef struct input_title_t
 static inline input_title_t *vlc_input_title_New(void)
 {
     input_title_t *t = (input_title_t*)malloc( sizeof( input_title_t ) );
+    if( !t )
+        return NULL;
 
     t->psz_name = NULL;
     t->b_menu = false;