Re-enable srmio for Travis-ci Linux builds

[skip AppVeyor]
The srmio build error on Ubuntu 22.04 when using
v0.1.1git1 is fixed in master.

src/FileIO/SrmDevice.cpp

@@ -85,7 +85,7 @@ SrmDevice::get_tmpname(const QDir &tmpdir, QString &tmpname, QString &err)
     tmp.setAutoRemove(false);
     if (!tmp.open()) {
         err = tr("Failed to create temporary file ")
-            + tmpl + ": " + tmp.error();
+            + tmpl + ": " + QString::number(tmp.error());
         return false;
     }
     tmpname = tmp.fileName(); // after close(), tmp.fileName() is ""

travis/linux/before_install.sh

@@ -32,15 +32,14 @@ if [ -z "$(ls -A D2XX)" ]; then
     tar xf libftd2xx-x86_64-1.4.27.tgz -C D2XX
 fi
 
-# SRMIO (disabled due to build errors)
-#wget --no-verbose https://github.com/rclasen/srmio/archive/v0.1.1git1.tar.gz
-#tar xf v0.1.1git1.tar.gz
-#cd srmio-0.1.1git1
-#sh genautomake.sh
-#./configure --disable-shared --enable-static
-#make --silent -j3
-#sudo make install
-#cd ${TRAVIS_BUILD_DIR}
+# SRMIO
+git clone https://github.com/rclasen/srmio.git
+cd srmio
+sh genautomake.sh
+./configure --disable-shared --enable-static
+make --silent -j3
+sudo make install
+cd ${TRAVIS_BUILD_DIR}
 
 # LIBUSB
 sudo apt-get install -qq libusb-1.0-0-dev libudev-dev

travis/linux/before_script.sh

@@ -32,8 +32,8 @@ sed -i "s|^#CloudDB|CloudDB|" src/gcconfig.pri
 sed -i "s|#\(D2XX_INCLUDE =.*\)|\1 ../D2XX/release|" src/gcconfig.pri
 # SAMPLERATE
 sed -i "s|#\(SAMPLERATE_INSTALL =\).*|\1 /usr|" src/gcconfig.pri
-# SRMIO (disabled due to build errors)
-#sed -i "s|#\(SRMIO_INSTALL =.*\)|\1 /usr/local|" src/gcconfig.pri
+# SRMIO
+sed -i "s|#\(SRMIO_INSTALL =.*\)|\1 /usr/local|" src/gcconfig.pri
 # Python
 echo DEFINES += GC_WANT_PYTHON >> src/gcconfig.pri
 echo PYTHONINCLUDES = -I/usr/include/python3.7 >> src/gcconfig.pri