Use GTK_IS_ENTRY() to determine if widget is a GtkEntry.

If widget is not a GtkEntry, using GTK_ENTRY() will result in assertion or crash

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72032 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/gtk/textentry.cpp b/src/gtk/textentry.cpp
index c1badd3203d8d2ecc6ef9dfea0ab7972db362f10..d9798282c021e0fcd143643e564f9c22db185234 100644 (file)
--- a/src/gtk/textentry.cpp
+++ b/src/gtk/textentry.cpp
@@ -204,9 +204,12 @@ long wxTextEntry::GetLastPosition() const
 {
     // this can't be implemented for arbitrary GtkEditable so only do it for
     // GtkEntries
-    GtkEntry * const entry = GTK_ENTRY(GetEditable());
+    long pos = -1;
+    GtkEditable* editable = GetEditable();
+    if (GTK_IS_ENTRY(editable))
+        pos = gtk_entry_get_text_length(GTK_ENTRY(editable));
 
-    return entry ? gtk_entry_get_text_length(entry) : -1;
+    return pos;
 }
 
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