use explicit file paths for CMake rather then globing, This is recommended by cmake devs.

globbing vs explicit is discussed here.
http://www.cmake.org/pipermail/cmake/2008-December/025694.html

Practical implications are:
- developers need to keep CMakeLists.txt files up to date.
- Users wont get strange linking errors if they build after a file is added, since CMake detects CMakeLists.txt is modified and automatically reconfigure.

source/gameengine/Network/CMakeLists.txt

@@ -24,8 +24,6 @@
 #
 # ***** END GPL LICENSE BLOCK *****
 
-FILE(GLOB SRC *.cpp)
-
 SET(INC
 	.
 	../../../source/kernel/gen_system
@@ -33,4 +31,10 @@ SET(INC
 	../../../intern/moto/include
 )
 
+SET(SRC
+	NG_NetworkMessage.cpp
+	NG_NetworkObject.cpp
+	NG_NetworkScene.cpp
+)
+
 BLENDERLIB(bf_ngnetwork "${SRC}" "${INC}")

source/gameengine/Network/LoopBackNetwork/CMakeLists.txt

@@ -24,8 +24,6 @@
 #
 # ***** END GPL LICENSE BLOCK *****
 
-SET(SRC NG_LoopBackNetworkDeviceInterface.cpp)
-
 SET(INC
 	.
 	../../../../source/kernel/gen_system
@@ -33,4 +31,8 @@ SET(INC
 	../../../../source/gameengine/Network
 )
 
+SET(SRC
+	NG_LoopBackNetworkDeviceInterface.cpp
+)
+
 BLENDERLIB(bf_loopbacknetwork "${SRC}" "${INC}")