Better handling of install counter

src/freedombone-utils-depends

@@ -33,12 +33,10 @@ function increment_install_progress {
 
     install_comment=$"1"
 
-    if [ ! "$install_counter" ]; then
-        if [ -f /root/.install_counter ]; then
-            install_counter=$(cat /root/.install_counter)
-        else
-            install_counter=0
-        fi
+    if [ -f /root/.install_counter ]; then
+        install_counter=$(cat /root/.install_counter)
+    else
+        install_counter=0
     fi
 
     if [ "$install_comment" ]; then