ints: Add support for mag(int32_t) and mag(int64_t)

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1817

src/OpenFOAM/primitives/ints/int32/int32.H

@@ -136,6 +136,12 @@ public:
 };
 
 
+inline int32_t mag(const int32_t l)
+{
+    return ::abs(l);
+}
+
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Foam

src/OpenFOAM/primitives/ints/int64/int64.H

@@ -127,6 +127,12 @@ public:
 };
 
 
+inline int64_t mag(const int64_t l)
+{
+    return ::labs(l);
+}
+
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Foam

src/OpenFOAM/primitives/ints/label/labelSpecific.H

@@ -36,15 +36,6 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-inline label mag(const label l)
-{
-    #if WM_LABEL_SIZE == 32
-        return ::abs(l);
-    #elif WM_LABEL_SIZE == 64
-        return ::labs(l);
-    #endif
-}
-
 inline label sign(const label s)
 {
     return (s >= 0)? 1: -1;