Make sure you have an executable module before trying to print its name.

llvm-svn: 131217
diff --git a/lldb/source/Target/Target.cpp b/lldb/source/Target/Target.cpp
index 080a54e4..942d081 100644
--- a/lldb/source/Target/Target.cpp
+++ b/lldb/source/Target/Target.cpp
@@ -97,7 +97,10 @@
     }
     else
     {
-        s->PutCString (GetExecutableModule()->GetFileSpec().GetFilename().GetCString());
+        if (GetExecutableModule())
+            s->PutCString (GetExecutableModule()->GetFileSpec().GetFilename().GetCString());
+        else
+            s->PutCString ("No executable module.");
     }
 }