Fix missing list name error in the main CMakeLists.txt file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index db15929..71532e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,6 +168,7 @@
 ########################################################################
 # Setup the include and linker paths
 ########################################################################
+
 list (APPEND grgsm_include_directories
     ${CMAKE_SOURCE_DIR}/lib
     ${CMAKE_SOURCE_DIR}/include
@@ -189,7 +190,7 @@
     ${grgsm_include_directories}
 )
 
-list (APPEND
+list (APPEND grgsm_link_directories
     ${Boost_LIBRARY_DIRS}
     ${CPPUNIT_LIBRARY_DIRS}
     ${GNURADIO_ALL_LIBRARY_DIRS}