From f287d6244133c935f9b22f0e6302e42149ed88f3 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 21 Oct 2017 16:07:58 +0200
Subject: Fix crash if no input and/or output engine has been set.

---
 drumgizmo/drumgizmoc.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drumgizmo/drumgizmoc.cc b/drumgizmo/drumgizmoc.cc
index 6bb4d1a..ba3abfc 100644
--- a/drumgizmo/drumgizmoc.cc
+++ b/drumgizmo/drumgizmoc.cc
@@ -375,6 +375,21 @@ int main(int argc, char* argv[])
 			return 1;
 		}
 	}
+
+	if(ie == nullptr)
+	{
+		std::cerr << "No input engine selected.\n";
+		std::cout << usage(argv[0]);
+		return 1;
+	}
+
+	if(oe == nullptr)
+	{
+		std::cerr << "No output engine selected.\n";
+		std::cout << usage(argv[0]);
+		return 1;
+	}
+
 	std::cout << "Using kitfile: " << kitfile << std::endl;
 
 	DrumGizmo gizmo(settings, *oe.get(), *ie.get());
-- 
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