fix a few compiler warnings.

src/host/criteria_matches.c

@@ -52,7 +52,7 @@ int criteria_compile(lua_State* L)
 	lua_setmetatable(L, -2);
 
 	/* create array to hold the incoming list of patterns */
-	n = lua_rawlen(L, 1);
+	n = (int)lua_rawlen(L, 1);
 	patterns->n = n;
 	patterns->pattern = (struct Pattern*)malloc(sizeof(struct Pattern) * n);
 
@@ -82,7 +82,7 @@ int criteria_compilePattern(lua_State* L, struct Pattern* pattern)
 	int i, n;
 
 	/* create array to hold the incoming list of words */
-	n = lua_rawlen(L, -1);
+	n = (int)lua_rawlen(L, -1);
 	pattern->n = n;
 	pattern->word = (struct Word*)malloc(sizeof(struct Word) * n);
 	pattern->matchesFiles = 0;

src/host/path_getabsolute.c

@@ -41,7 +41,7 @@ void do_getabsolute(char* result, const char* value, const char* relative_to)
 	while (ch) {
 		/* remove ".." where I can */
 		if (strcmp(ch, "..") == 0 && (prev == NULL || (prev[0] != '$' && prev[0] != '%' && strcmp(prev, "..") != 0))) {
-			i = strlen(result) - 2;
+			i = (int)strlen(result) - 2;
 			while (i >= 0 && result[i] != '/') {
 				--i;
 			}
@@ -62,7 +62,7 @@ void do_getabsolute(char* result, const char* value, const char* relative_to)
 	}
 
 	/* remove trailing slash */
-	i = strlen(result) - 1;
+	i = (int)strlen(result) - 1;
 	if (result[i] == '/') {
 		result[i] = '\0';
 	}

src/host/string_endswith.c

@@ -15,8 +15,8 @@ int string_endswith(lua_State* L)
 
 	if (haystack && needle)
 	{
-		int hlen = strlen(haystack);
+		size_t hlen = strlen(haystack);
-		int nlen = strlen(needle);
+		size_t nlen = strlen(needle);
 		if (hlen >= nlen) 
 		{
 			lua_pushboolean(L, strcmp(haystack + hlen - nlen, needle) == 0);

src/host/string_startswith.c

@@ -15,7 +15,7 @@ int string_startswith(lua_State* L)
 
 	if (haystack && needle)
 	{
-		int nlen = strlen(needle);
+		size_t nlen = strlen(needle);
 		lua_pushboolean(L, strncmp(haystack, needle, nlen) == 0);
 		return 1;
 	}