From c935df7923841296459abea939f8a18e4cfd25ec Mon Sep 17 00:00:00 2001
From: jkriege2 <jan@jkrieger.de>
Date: Thu, 13 Dec 2018 22:42:58 +0100
Subject: [PATCH] fixed compile error with MINGW

---
 lib/jkqtmathtext/jkqtmathtext.cpp | 3 ++-
 lib/jkqtmathtext/jkqtmathtext.h   | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/jkqtmathtext/jkqtmathtext.cpp b/lib/jkqtmathtext/jkqtmathtext.cpp
index e74df6871b..bd5f5c5ece 100644
--- a/lib/jkqtmathtext/jkqtmathtext.cpp
+++ b/lib/jkqtmathtext/jkqtmathtext.cpp
@@ -446,7 +446,8 @@ JKQTmathText::MTinstruction1Node::MTinstruction1Node(JKQTmathText* parent, QStri
     this->child=child;
     this->parameters=parameters;
 
-    if (!setupMTenvironment()) {
+    JKQTmathText::MTenvironment ev;
+    if (!setupMTenvironment(ev)) {
         parent->error_list.append(tr("unknown instruction '%1' found!").arg(name));
     }
 }
diff --git a/lib/jkqtmathtext/jkqtmathtext.h b/lib/jkqtmathtext/jkqtmathtext.h
index c4357ebbd9..386147213e 100644
--- a/lib/jkqtmathtext/jkqtmathtext.h
+++ b/lib/jkqtmathtext/jkqtmathtext.h
@@ -389,7 +389,7 @@ class LIB_EXPORT JKQTmathText : public QObject {
                 JKQTPGET_MACRO(QString, name)
                 JKQTPGET_MACRO(QStringList, parameters)
             protected:
-                bool setupMTenvironment(JKQTmathText::MTenvironment &ev = JKQTmathText::MTenvironment());
+                bool setupMTenvironment(JKQTmathText::MTenvironment &ev);
 
                 MTnode* child;
                 QString name;