Fixed #588 (Preprocessor: Sort the configurations)

http://sourceforge.net/apps/trac/cppcheck/ticket/588

src/preprocessor.cpp

@@ -779,6 +779,8 @@ std::list<std::string> Preprocessor::getcfgs(const std::string &filedata)
             ++it;
     }
 
+    ret.sort();
+
     return ret;
 }
 

src/preprocessor.h

@@ -118,7 +118,8 @@ private:
     static std::string removeSpaceNearNL(const std::string &str);
 
     /**
-     * Get all possible configurations. By looking at the ifdefs and ifndefs in filedata
+     * Get all possible configurations sorted in alphabetical order.
+     * By looking at the ifdefs and ifndefs in filedata
      */
     std::list<std::string> getcfgs(const std::string &filedata);