Fix .NET detection on 32bit platform

Change-Id: I5eaa098d1de6b57245aca7bba2274139e60ba402
Reviewed-on: https://gerrit.libreoffice.org/23159
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Ostrovsky <david@ostrovsky.org>

configure.ac

@@ -5279,13 +5279,17 @@ find_dotnetsdk46()
 {
     unset frametest
 
-    for ver in 4.6; do
-        # TODO(davido): Do we need to take care about 32bit?
+    for ver in 4.6.1 4.6; do
         reg_get_value_64 "HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Microsoft/Microsoft SDKs/NETFXSDK/$ver/KitsInstallationFolder"
         if test -n "$regvalue"; then
             frametest=$regvalue
             return
         fi
+        reg_get_value_32 "HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Microsoft SDKs/NETFXSDK/$ver/KitsInstallationFolder"
+        if test -n "$regvalue"; then
+            frametest=$regvalue
+            return
+        fi
     done
 }