* Sync up to trunk head (r64921).

[reactos.git] / lib / rtl / bitmap.c

diff --git a/lib/rtl/bitmap.c b/lib/rtl/bitmap.c
index c7aa880..378c94c 100644 (file)
--- a/lib/rtl/bitmap.c
+++ b/lib/rtl/bitmap.c
@@ -362,8 +362,11 @@ RtlClearBits(
 
     /* Clear what's left */
     NumberToClear &= (_BITCOUNT - 1);
-    Mask = MAXINDEX << NumberToClear;
-    *Buffer &= Mask;
+    if (NumberToClear != 0)
+    {
+        Mask = MAXINDEX << NumberToClear;
+        *Buffer &= Mask;
+    }
 }
 
 VOID
@@ -419,8 +422,11 @@ RtlSetBits(
 
     /* Set what's left */
     NumberToSet &= (_BITCOUNT - 1);
-    Mask = MAXINDEX << NumberToSet;
-    *Buffer |= ~Mask;
+    if (NumberToSet != 0)
+    {
+        Mask = MAXINDEX << NumberToSet;
+        *Buffer |= ~Mask;
+    }
 }
 
 BOOLEAN