Update project files for all Windows supported compilers

PC/VC6/pythoncore.dsp

@@ -197,6 +197,10 @@ SOURCE=..\..\Modules\arraymodule.c
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\Python\_warnings.c
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\Python\asdl.c
 # End Source File
 # Begin Source File

PC/VS7.1/pythoncore.vcproj

@@ -412,6 +412,9 @@
 		<File
 			RelativePath="..\..\Modules\arraymodule.c">
 		</File>
+		<File
+			RelativePath="..\..\Python\_warnings.c">
+		</File>
 		<File
 			RelativePath="..\..\Python\asdl.c">
 		</File>

PC/VS8.0/pythoncore.vcproj

@@ -1614,6 +1614,10 @@
 		<Filter
 			Name="Python"
 			>
+			<File
+				RelativePath="..\..\Python\_warnings.c"
+				>
+			</File>
 			<File
 				RelativePath="..\..\Python\asdl.c"
 				>

PCbuild/pythoncore.vcproj

@@ -1614,6 +1614,10 @@
 		<Filter
 			Name="Python"
 			>
+			<File
+				RelativePath="..\Python\_warnings.c"
+				>
+			</File>
 			<File
 				RelativePath="..\Python\asdl.c"
 				>
@@ -1778,10 +1782,6 @@
 				RelativePath="..\Python\traceback.c"
 				>
 			</File>
-                        <File
-                                RelativePath="..\Python\_warnings.c"
-                                >
-                        </File>
 		</Filter>
 		<Filter
 			Name="Resource Files"