Attempt to fix Unix builds. Evidently the #define copied from a VC++ header

file is particular to Microsoft's compiler. Bastards...

layout/html/content/src/nsHTMLLayerElement.cpp

@@ -28,7 +28,7 @@
 #include "nsIPresContext.h"
 #include "nsIHTMLAttributes.h"
 
-#define _I32_MIN  (-2147483647i32 - 1) /* minimum signed 32 bit value */
+#define _I32_MIN  (-2147483647 - 1) /* minimum signed 32 bit value */
 
 static NS_DEFINE_IID(kIDOMHTMLLayerElementIID, NS_IDOMHTMLELEMENT_IID);