[gupnp-igd] Append environment's LD_LIBRARY_PATH if set

[Jens Georg <jensgeorg src gnome org>]

commit 4f0de3b51cdaa4a062576e2aa45f5e1c990da440
Author: Jens Georg <mail jensge org>
Date:   Fri Nov 23 14:50:48 2012 +0100

    Append environment's LD_LIBRARY_PATH if set
    
    Fixes running tests in make check.

 tests/gtest/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/gtest/Makefile.am b/tests/gtest/Makefile.am
index 792df8d..5555b41 100644
--- a/tests/gtest/Makefile.am
+++ b/tests/gtest/Makefile.am
@@ -3,7 +3,7 @@ if HAVE_GTEST
 
 TESTS_ENVIRONMENT = XML_PATH=$(srcdir) \
 	G_SLICE=debug-blocks \
-	LD_LIBRARY_PATH=$(top_builddir)/libgupnp-igd/.libs
+	LD_LIBRARY_PATH=$(top_builddir)/libgupnp-igd/.libs:$(LD_LIBRARY_PATH)
 
 TESTS = $(check_PROGRAMS)