Fix GH-15752: finfo_file() - parameter validation error message

Show the correct parameter name and number - the error is caused by the second
parameter being empty, not the first.

Author: DanielEScherzer

ext/fileinfo/fileinfo.c

@@ -374,7 +374,7 @@ static void _php_finfo_get_type(INTERNAL_FUNCTION_PARAMETERS, int mode, int mime
 			php_stream_statbuf ssb;
 
 			if (buffer == NULL || buffer_len == 0) {
-				zend_argument_value_error(1, "cannot be empty");
+				zend_argument_value_error(2, "cannot be empty");
 				goto clean;
 			}
 			if (CHECK_NULL_PATH(buffer, buffer_len)) {

ext/fileinfo/tests/gh15752.phpt

@@ -0,0 +1,18 @@
+--TEST--
+GH-15752 (finfo_file() empty parameter name error)
+--EXTENSIONS--
+fileinfo
+--FILE--
+<?php
+
+$info = finfo_open(FILEINFO_MIME_TYPE);
+
+try {
+    echo finfo_file($info, '') . "\n";
+} catch ( ValueError $e)  {
+    echo $e->getMessage(), "\n";
+}
+
+?>
+--EXPECT--
+finfo_file(): Argument #2 ($filename) cannot be empty