Fix some Developer Studio compiler warnings

Author: k0ekk0ek

src/bench.c

@@ -14,7 +14,6 @@
 # include "getopt.h"
 #else
 # include <unistd.h>
-# include <strings.h>
 #endif
 
 #include "zone.h"
@@ -26,6 +25,8 @@
 #if _MSC_VER
 #define strcasecmp(s1, s2) _stricmp(s1, s2)
 #define strncasecmp(s1, s2, n) _strnicmp(s1, s2, n)
+#else
+#include <strings.h>
 #endif
 
 typedef zone_parser_t parser_t;

src/zone.c

@@ -292,8 +292,11 @@ static int32_t open_file(
   if (file != &parser->first)
     includer = parser->file->path;
   if(strcmp(file->name, "-") == 0) {
-    if(!(file->path = strdup(file->name)))
+    if (!(file->path = malloc(2)))
       return ZONE_OUT_OF_MEMORY;
+    // FIXME: reading from stdin must only be supported for the initial file
+    file->path[0] = '-';
+    file->path[1] = '\0';
   } else if ((code = resolve_path(includer, file->name, &file->path)))
     return (void)close_file(parser, file), code;