b=30391 r=troy@netscape.com Patch from rbs@maths.uq.edu.au to add parens when

necessary to PR_ABS macro

layout/generic/nsTextFrame.cpp

@@ -68,7 +68,7 @@
 #include "nsIServiceManager.h"
 
 #ifndef PR_ABS
-#define PR_ABS(x) (x < 0 ? -x : x)
+#define PR_ABS(x) ((x) < 0 ? -(x) : (x))
 #endif
 
 static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);

layout/html/base/src/nsTextFrame.cpp

@@ -68,7 +68,7 @@
 #include "nsIServiceManager.h"
 
 #ifndef PR_ABS
-#define PR_ABS(x) (x < 0 ? -x : x)
+#define PR_ABS(x) ((x) < 0 ? -(x) : (x))
 #endif
 
 static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);