fix typo

alib2data/src/regexp/RegExpAlphabetGetter.h

@@ -5,8 +5,8 @@
  *      Author: Jan Travnicek
  */
-#ifndef REX_EXP_ALPHABET_GETTER_H_
-#define REX_EXP_ALPHABET_GETTER_H_
+#ifndef REG_EXP_ALPHABET_GETTER_H_
+#define REG_EXP_ALPHABET_GETTER_H_
 #include <set>
 #include "RegExp.h"
@@ -37,4 +37,4 @@ public:
 } /* namespace regexp */
-#endif /* REX_EXP_ALPHABET_GETTER_H_ */
+#endif /* REG_EXP_ALPHABET_GETTER_H_ */