(svn r26509) -Codechange: replace strdup with stredup (the latter ensures the return is not NULL)

src/saveload/engine_sl.cpp

@@ -12,6 +12,7 @@
 #include "../stdafx.h"
 #include "saveload_internal.h"
 #include "../engine_base.h"
+#include "../string_func.h"
 #include <map>
 
 #include "../safeguards.h"
@@ -107,7 +108,7 @@ void CopyTempEngineData()
 		e->preview_company     = se->preview_company;
 		e->preview_wait        = se->preview_wait;
 		e->company_avail       = se->company_avail;
-		if (se->name != NULL) e->name = strdup(se->name);
+		if (se->name != NULL) e->name = stredup(se->name);
 	}
 
 	/* Get rid of temporary data */

src/saveload/game_sl.cpp

@@ -153,7 +153,7 @@ static void Load_GSTR()
 		LanguageStrings *ls = new LanguageStrings(_game_saveload_string != NULL ? _game_saveload_string : "");
 		for (uint i = 0; i < _game_saveload_strings; i++) {
 			SlObject(NULL, _game_language_string);
-			*ls->lines.Append() = strdup(_game_saveload_string != NULL ? _game_saveload_string : "");
+			*ls->lines.Append() = stredup(_game_saveload_string != NULL ? _game_saveload_string : "");
 		}
 
 		*_current_data->raw_strings.Append() = ls;

src/saveload/saveload.cpp

@@ -527,11 +527,11 @@ void NORETURN SlError(StringID string, const char *extra_msg)
 	if (_sl.action == SLA_LOAD_CHECK) {
 		_load_check_data.error = string;
 		free(_load_check_data.error_data);
-		_load_check_data.error_data = (extra_msg == NULL) ? NULL : strdup(extra_msg);
+		_load_check_data.error_data = (extra_msg == NULL) ? NULL : stredup(extra_msg);
 	} else {
 		_sl.error_str = string;
 		free(_sl.extra_msg);
-		_sl.extra_msg = (extra_msg == NULL) ? NULL : strdup(extra_msg);
+		_sl.extra_msg = (extra_msg == NULL) ? NULL : stredup(extra_msg);
 	}
 
 	/* We have to NULL all pointers here; we might be in a state where

src/saveload/strings_sl.cpp

@@ -94,10 +94,10 @@ char *CopyFromOldName(StringID id)
 		/* Terminate the new string and copy it back to the name array */
 		*strto = '\0';
 
-		return strdup(tmp);
+		return stredup(tmp);
 	} else {
 		/* Name will already be in UTF-8. */
-		return strdup(&_old_name_array[LEN_OLD_STRINGS * GB(id, 0, 9)]);
+		return stredup(&_old_name_array[LEN_OLD_STRINGS * GB(id, 0, 9)]);
 	}
 }