egcs 'ambiguous else' warnings fixes.

diff --git a/memory/heap.c b/memory/heap.c
index 5a0f7ad..b73d1d0 100644
--- a/memory/heap.c
+++ b/memory/heap.c
@@ -1435,10 +1435,12 @@
     /* Determine new heap size */
 
     if ( segment )
+    {
         if ( (segSize = GetSelectorLimit( segment )) == 0 )
             return 0;
         else
             segSize++;
+    }
 
     if ( heapSize == -1L )
         heapSize = 1024L*1024L;   /* FIXME */