msxml3: Add a break to a switch statement

[Andrew Talbot]

Changelog:
    msxml3: Add a break to a switch statement.

diff --git a/dlls/msxml3/domdoc.c b/dlls/msxml3/domdoc.c
index 2eedc78..41ff5b0 100644
--- a/dlls/msxml3/domdoc.c
+++ b/dlls/msxml3/domdoc.c
@@ -1957,7 +1957,9 @@ static HRESULT WINAPI domdoc_createNode(
     case NODE_ATTRIBUTE:
     case NODE_ENTITY_REFERENCE:
     case NODE_PROCESSING_INSTRUCTION:
-        if (!name || *name == 0) return E_FAIL;
+        if (!name || *name == 0)
+            return E_FAIL;
+        break;
     default:
         break;
     }