COMP: resolve clamp() float/double ambiguity (SPDP compilation)

- pass by value instead of reference, add functional casts in some
  places. Can still rely on integer promotions though.

  OK:   clamp(value, 2, 20)   ==> (float, int, int)
  OK:   clamp(value, scalar(2), scalar(20))  ==> (float, float, float)
  NOK:  clamp(value, 2.0, 20) ==> (float, double, int)

applications/test/minMax2/Make/options

@@ -1,7 +1,2 @@
-EXE_INC = \
-    -I$(LIB_SRC)/finiteVolume/lnInclude \
-    -I$(LIB_SRC)/meshTools/lnInclude
-
-EXE_LIBS = \
-    -lfiniteVolume \
-    -lmeshTools
+/* EXE_INC = */
+/* EXE_LIBS = */

applications/test/minMax2/Test-minMax2.C

@@ -28,7 +28,7 @@ Description
 
 \*---------------------------------------------------------------------------*/
 
-#include "fvCFD.H"
+#include "argList.H"
 #include "Time.H"
 #include "BitOps.H"
 #include "HashOps.H"