seems like there is a problem opening files with the optional 'b' mode, so remove it everywhere?

src/bind_storage.c

@@ -32,7 +32,7 @@ without prior permission by the authors of Eressea.
 static int tolua_storage_create(lua_State * L)
 {
     const char *filename = tolua_tostring(L, 1, 0);
-    const char *type = tolua_tostring(L, 2, "rb");
+    const char *type = tolua_tostring(L, 2, "r");
     gamedata *data;
 
     data = gamedata_open(filename, type);

src/kernel/group.test.c

@@ -23,7 +23,7 @@ static void test_group_readwrite(CuTest * tc)
     FILE *F;
     stream strm;
 
-    F = fopen("test.dat", "wb");
+    F = fopen("test.dat", "w");
     fstream_init(&strm, F);
     binstore_init(&store, &strm);
     test_cleanup();
@@ -36,7 +36,7 @@ static void test_group_readwrite(CuTest * tc)
     binstore_done(&store);
     fstream_done(&strm);
 
-    F = fopen("test.dat", "rb");
+    F = fopen("test.dat", "r");
     fstream_init(&strm, F);
     binstore_init(&store, &strm);
     f->groups = 0;

src/kernel/save.c

@@ -256,7 +256,7 @@ int readorders(const char *filename)
     int nfactions = 0;
     struct faction *f = NULL;
 
-    F = fopen(filename, "rb");
+    F = fopen(filename, "r");
     if (!F) {
         perror(filename);
         return -1;
@@ -1407,7 +1407,7 @@ int readgame(const char *filename, bool backup)
         create_backup(path);
     }
 
-    F = fopen(path, "rb");
+    F = fopen(path, "r");
     if (!F) {
         perror(path);
         return -1;
@@ -1753,7 +1753,7 @@ int writegame(const char *filename)
     /* make sure we don't overwrite an existing file (hard links) */
     unlink(path);
 #endif
-    F = fopen(path, "wb");
+    F = fopen(path, "w");
     if (!F) {
         perror(path);
         return -1;

src/kernel/save.test.c

@@ -50,7 +50,7 @@ static void test_readwrite_unit(CuTest * tc)
     free_gamedata();
     f = test_create_faction(0);
     renumber_faction(f, fno);
-    data = gamedata_open(path, "rb");
+    data = gamedata_open(path, "r");
     u = read_unit(data);
     gamedata_close(data);
 

storage

@@ -1 +1 @@
-Subproject commit 89f3c1b01e41f2675fcbfd51fd8494894dc22d44
+Subproject commit 18cc3bb8f8906237915eb31c9899f95340318087