Remove references to strncasecmp; strdup

Update tinydir submodule to remove strncasecmp
Said functions are causing compiler problems

.gitignore

@@ -7,6 +7,7 @@ cdogs-sdl
 *.tar.gz
 cdogs-sdl-editor
 libcdogs.a
+libcdogsedlib.a
 autosave_test
 color_test
 config_test

src/cdogs/files.c

@@ -513,14 +513,14 @@ const char *GetHomeDirectory(void)
 	p = getenv("CDOGS_CONFIG_DIR");
 	if (p != NULL && strlen(p) != 0)
 	{
-		cdogs_homepath = strdup(p);
+		CSTRDUP(cdogs_homepath, p);
 		return cdogs_homepath;
 	}
 
 	p = getenv(HOME_DIR_ENV);
 	if (p != NULL && strlen(p) != 0)
 	{
-		cdogs_homepath = calloc(strlen(p) + 1, sizeof(char));
+		CCALLOC(cdogs_homepath, strlen(p) + 1);
 		strncpy(cdogs_homepath, p, strlen(p));
 		strncat(cdogs_homepath, "/", 1);
 		return cdogs_homepath;

src/cdogs/map_new.c

@@ -590,7 +590,8 @@ int MapNewSave(const char *filename, CampaignSetting *c)
 	char *text = NULL;
 	char buf[CDOGS_PATH_MAX];
 	json_t *root;
-	if (SDL_strcasecmp(StrGetFileExt(filename), "cpn") == 0)
+	if (strcmp(StrGetFileExt(filename), "cpn") == 0 ||
+		strcmp(StrGetFileExt(filename), "CPN") == 0)
 	{
 		strcpy(buf, filename);
 	}

src/cdogs/pic_manager.c

@@ -128,7 +128,7 @@ static void PicManagerLoadDirImpl(
 			goto bail;
 		}
 		if (file.is_reg &&
-			SDL_strcasecmp(StrGetFileExt(file.name), "png") == 0)
+			IMG_isPNG(SDL_RWFromFile(file.path, "rb")))
 		{
 			if (prefix)
 			{

src/cdogs/utils.h

@@ -92,8 +92,8 @@ extern int debug_level;
 }
 #define CSTRDUP(_var, _str)\
 {\
-	_var = strdup(_str); \
-	_CCHECKALLOC("CSTRDUP", _var, (strlen(_str) + 1))\
+	CMALLOC(_var, strlen(_str) + 1);\
+	strcpy(_var, _str);\
 }
 
 #define CFREE(_var)\