comcat: Constify some variables

[Andrew Talbot]

Changelog:
    comcat: Constify some variables.

diff -urN a/dlls/comcat/information.c b/dlls/comcat/information.c
--- a/dlls/comcat/information.c	2007-03-19 17:26:38.000000000 +0000
+++ b/dlls/comcat/information.c	2007-04-01 20:00:24.000000000 +0100
@@ -35,7 +35,7 @@
 };
 
 static struct class_categories *COMCAT_PrepareClassCategories(
-    ULONG impl_count, CATID *impl_catids, ULONG req_count, CATID *req_catids);
+    ULONG impl_count, const CATID *impl_catids, ULONG req_count, const CATID *req_catids);
 static HRESULT COMCAT_IsClassOfCategories(
     HKEY key, struct class_categories const* class_categories);
 static LPENUMGUID COMCAT_CLSID_IEnumGUID_Construct(
@@ -513,7 +513,7 @@
  * COMCAT_PrepareClassCategories
  */
 static struct class_categories *COMCAT_PrepareClassCategories(
-    ULONG impl_count, CATID *impl_catids, ULONG req_count, CATID *req_catids)
+    ULONG impl_count, const CATID *impl_catids, ULONG req_count, const CATID *req_catids)
 {
     struct class_categories *categories;
     WCHAR *strings;
diff -urN a/dlls/comcat/register.c b/dlls/comcat/register.c
--- a/dlls/comcat/register.c	2007-03-19 17:26:38.000000000 +0000
+++ b/dlls/comcat/register.c	2007-04-01 21:19:50.000000000 +0100
@@ -41,10 +41,10 @@
 
 static HRESULT COMCAT_RegisterClassCategories(
     REFCLSID rclsid, LPCWSTR type,
-    ULONG cCategories, CATID *rgcatid);
+    ULONG cCategories, const CATID *rgcatid);
 static HRESULT COMCAT_UnRegisterClassCategories(
     REFCLSID rclsid, LPCWSTR type,
-    ULONG cCategories, CATID *rgcatid);
+    ULONG cCategories, const CATID *rgcatid);
 
 /**********************************************************************
  * COMCAT_ICatRegister_QueryInterface
@@ -256,7 +256,7 @@
     REFCLSID rclsid,
     LPCWSTR type,
     ULONG cCategories,
-    CATID *rgcatid)
+    const CATID *rgcatid)
 {
     WCHAR keyname[39];
     HRESULT res;
@@ -309,7 +309,7 @@
     REFCLSID rclsid,
     LPCWSTR type,
     ULONG cCategories,
-    CATID *rgcatid)
+    const CATID *rgcatid)
 {
     WCHAR keyname[68] = { 'C', 'L', 'S', 'I', 'D', '\\' };
     HRESULT res;