check "headless nosound" mode in Travis

.travis.yml

@@ -12,6 +12,10 @@ matrix:
     - gcc
     script:
     - echo $TRAVIS_TAG
+    # headless server compilation
+    - qmake "CONFIG+=headless nosound" Jamulus.pro
+    - make
+    # normal compilation
     - qmake Jamulus.pro
     - make
     #deploy function is only available in travis-ci.com (not free) but not in travis-ci.org (free)

Jamulus.pro

@@ -281,8 +281,7 @@ win32 {
     DEFINES += HAVE_STDINT_H
 
     # only include jack support if CONFIG nosound is not set
-    nosoundoption = $$find(CONFIG, "nosound")
-    count(nosoundoption, 0) {
+    !contains(CONFIG, "nosound") {
         message(Jack Audio Interface Enabled.)
 
         contains(CONFIG, "raspijamulus") {