Fix Bug #67468 Segfault in highlight_file()/highlight_string() when pgsql.so module is loaded

str_efree() must be used in zend_highlight() and zend_indent() to free
string data assigned to a zval to account for interned strings.

Zend/zend_highlight.c

@@ -150,7 +150,7 @@ ZEND_API void zend_highlight(zend_syntax_highlighter_ini *syntax_highlighter_ini
 				case T_DOC_COMMENT:
 					break;
 				default:
-					efree(token.value.str.val);
+					str_efree(token.value.str.val);
 					break;
 			}
 		}

Zend/zend_indent.c

@@ -139,7 +139,7 @@ dflt_printout:
 			case T_WHITESPACE:
 				break;
 			default:
-				efree(token.value.str.val);
+				str_efree(token.value.str.val);
 				break;
 			}
 		}