Fixed some issues with calling conventions for Borland/Microsoft compilers

[SVN r10114]

include/boost/regex/detail/regex_stack.hpp

@@ -36,11 +36,7 @@ namespace boost{
    namespace re_detail{
 
 #ifdef __BORLANDC__
-   #if __BORLANDC__ == 0x530
-    #pragma option push -a4 -b -Ve
-   #elif __BORLANDC__ > 0x530
-    #pragma option push -a8 -b -Ve
-   #endif
+   #pragma option push -a4 -b -Ve -pc
 #endif
 
 //
@@ -211,9 +207,7 @@ jstack<T, Allocator>::~jstack()
 }
 
 #ifdef __BORLANDC__
- #if __BORLANDC__ > 0x520
   #pragma option pop
- #endif
 #endif
 
 } // namespace re_detail