Fixed compiler warning "incompatible pointer type"

ext/filter/sanitizing_filters.c

@@ -250,7 +250,8 @@ void php_filter_special_chars(PHP_INPUT_FILTER_PARAM_DECL)
 void php_filter_full_special_chars(PHP_INPUT_FILTER_PARAM_DECL)
 {
 	char *buf;
-	int   len, quotes;
+	size_t len;
+	int quotes;
 	
 	if (!(flags & FILTER_FLAG_NO_ENCODE_QUOTES)) {
 		quotes = ENT_QUOTES;

ext/mysqlnd/mysqlnd_bt.c

@@ -373,7 +373,7 @@ static int mysqlnd_build_trace_args(zval **arg TSRMLS_DC, int num_args, va_list
 
 			TRACE_APPEND_STR("Object(");
 
-			dupl = zend_get_object_classname(*arg, &class_name, &class_name_len TSRMLS_CC);
+			dupl = zend_get_object_classname(*arg, (const char **)&class_name, &class_name_len TSRMLS_CC);
 
 			TRACE_APPEND_STRL(class_name, class_name_len);
 			if (!dupl) {

ext/pdo/pdo.c

@@ -277,7 +277,7 @@ PDO_API int php_pdo_parse_data_source(const char *data_source,
 					parsed[j].optval = estrndup(data_source + valstart, semi - valstart - n_semicolumns);
 				} else {
 					int vlen = semi - valstart;
-					char *orig_val = data_source + valstart;
+					const char *orig_val = data_source + valstart;
 					char *new_val  = (char *) emalloc(vlen - n_semicolumns + 1);
 				
 					parsed[j].optval = new_val;