Fix warnings by qmake -Wall, cleanups

winconf-mingw.pri

@@ -1,5 +1,5 @@
-strace_win:{
-  contains(QMAKE_HOST.arch, x86):{
+strace_win{
+  contains(QMAKE_HOST.arch, x86) {
     # i686 arch requires frame pointer preservation
     QMAKE_CXXFLAGS_RELEASE += -fno-omit-frame-pointer
     QMAKE_CXXFLAGS_DEBUG += -fno-omit-frame-pointer
@@ -17,10 +17,6 @@ CONFIG(debug, debug|release) {
 
 RC_FILE = qbittorrent_mingw.rc
 
-#You need to link with libtorrent > 0.15.5 (or svn) and you must
-#configure libtorrent to use iconv in the building process. This is
-#needed for correct Unicode support.
-
 # Adapt the lib names/versions accordingly
 CONFIG(debug, debug|release) {
   LIBS += libtorrent \

winconf-msvc.pri

@@ -1,10 +1,10 @@
-strace_win:{
-  contains(QMAKE_HOST.arch, x86):{
+strace_win {
+  contains(QMAKE_HOST.arch, x86) {
     # i686 arch requires frame pointer preservation
     QMAKE_CXXFLAGS_RELEASE += -Oy-
     QMAKE_CXXFLAGS_DEBUG += -Oy-
   }
-  release:{
+  release {
     QMAKE_CXXFLAGS_RELEASE += -Zi
     QMAKE_LFLAGS += "/DEBUG"
   }