fix compile issue with gcc 4.3

ChangeLog

@@ -1,5 +1,8 @@
  (Format: Year/Month/Day)
 Changes for 1.0.1:
+*07/12/14:
+   * Fix compiling with gcc 4.3 (thanks Dmitry E. Oboukhov)
+     main.cc
 *07/12/13:
    * Fix configure option --with-style (thanks Slava Semushin)
      configure.in Makefile.am

src/main.cc

@@ -45,6 +45,12 @@
   #include <stdlib.h>
 #endif
 
+#ifdef HAVE_CSTRING
+  #include <cstring>
+#else
+  #include <string.h>
+#endif
+
 #include <iostream>
 #include <fstream>
 #include <stdexcept>