Adding 'static const' for arg numbers used with CallCFunction.

src/arm/regexp-macro-assembler-arm.cc

Index: src/arm/regexp-macro-assembler-arm.cc
===================================================================
--- src/arm/regexp-macro-assembler-arm.cc	(revision 3946)
+++ src/arm/regexp-macro-assembler-arm.cc	(working copy)
@@ -765,7 +765,7 @@
     Label grow_failed;
 
     // Call GrowStack(backtrack_stackpointer())
-    int num_arguments = 2;
+    static const int num_arguments = 2;
     FrameAlign(num_arguments, r0);
     __ mov(r0, backtrack_stackpointer());
     __ add(r1, frame_pointer(), Operand(kStackHighEnd));
@@ -966,7 +966,7 @@
 // Private methods:
 
 void RegExpMacroAssemblerARM::CallCheckStackGuardState(Register scratch) {
-  int num_arguments = 3;
+  static const int num_arguments = 3;
   FrameAlign(num_arguments, scratch);
   // RegExp code frame pointer.
   __ mov(r2, frame_pointer());