freetdm: add new files for vs2008 project

libs/freetdm/msvc/freetdm.2008.vcproj

@@ -338,6 +338,10 @@
 				RelativePath="..\src\include\private\ftdm_buffer.h"
 				>
 			</File>
+			<File
+				RelativePath="..\src\include\private\ftdm_call_utils.h"
+				>
+			</File>
 			<File
 				RelativePath="..\src\include\private\ftdm_config.h"
 				>
@@ -416,6 +420,10 @@
 				RelativePath="..\src\ftdm_buffer.c"
 				>
 			</File>
+			<File
+				RelativePath="..\src\ftdm_call_utils.c"
+				>
+			</File>
 			<File
 				RelativePath="..\src\ftdm_callerid.c"
 				>