Adds TryExec statement to marble.desktop as libbarble4 depends on marble-data containing the .desktop but not the binary.
Index: kdeedu-4.2.0/marble/src/marble.desktop
===================================================================
--- kdeedu-4.2.0.orig/marble/src/marble.desktop	2009-01-30 19:51:03.000000000 +0100
+++ kdeedu-4.2.0/marble/src/marble.desktop	2009-01-30 19:51:46.000000000 +0100
@@ -1,6 +1,7 @@
 [Desktop Entry]
 Type=Application
 Exec=marble
+TryExec=marble
 Name=Marble
 Name[gu]=માર્બલ
 Name[hi]=संगमरमर