Fix printf usage for -Wformat-security

Signed-off-by: falkTX <falktx@falktx.com>

src/jackpatch.c

@@ -784,7 +784,7 @@ main ( int argc, char **argv )
                 "Options:\n"
                 "  --help                Show this screen\n"
                 "";
-                printf ( usage );
+                puts ( usage );
                 exit(0);
                 break;
                 }

src/legacy-gui.cpp

@@ -1363,7 +1363,7 @@ main (int argc, char **argv )
                 "For backwards compatibility this executable also exist as symlink 'non-session-manager'\n"
                 "\n"
                 "";
-                printf ( usage );
+                puts ( usage );
                 exit(0);
                 break;
         }

src/nsm-proxy-gui.cpp

@@ -299,7 +299,7 @@ main ( int argc, char **argv )
                 "nsmd-proxy-gui is usually not called by the user directly,\n"
                 "but autostarted when nsm-proxy is added to a session (through a GUI).\n"
                 "";
-                printf ( usage );
+                puts ( usage );
                 exit(0);
                 break;
             }

src/nsm-proxy.cpp

@@ -751,7 +751,7 @@ main ( int argc, char **argv )
                 "Options:\n"
                 "  --help                Show this screen\n"
                 "";
-                printf ( usage );
+                puts ( usage );
                 exit(0);
                 break;
                 }

src/nsmd.cpp

@@ -2472,7 +2472,7 @@ int main(int argc, char *argv[])
                 "nsmd can be run headless with existing sessions. To create new ones it is recommended to use a GUI\n"
                 "such as nsm-legacy-gui (included) or Argodejo (separate package)\n"
                 "";
-                printf ( usage );
+                puts ( usage );
                 exit(0);
                 break;
         }