Allowed negative amplify value for reverting axis direction

configure.ac

@@ -22,7 +22,7 @@
 
 AC_PREREQ(2.57)
 AC_INIT([xf86-input-joystick],
-        1.1.1,
+        1.2.0,
         [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],
         xf86-input-joystick)
 

man/joystick.man

@@ -81,6 +81,8 @@ Amplifies the influence of the axis. To make cursor movement slower, set to valu
 .IR \<1.0 .
 To make it faster, set to value
 .IR \>1.0 .
+To invert movement direction, set to a
+.IR "negative value" .
 Default: 1.0
 
 .RE

src/jstk.c

@@ -510,7 +510,7 @@ xf86JstkCorePreInit(InputDriverPtr drv, IDevPtr dev, int flags)
         }
         if ((s=strstr(param, "amplify=")) != NULL ) {
           if (sscanf(s, "amplify=%f", &fvalue) == 1) {
-            if ((fvalue > 10000)||(fvalue < 0.00001))
+            if ((fvalue > 10000)||(fvalue < -10000.0))
               xf86Msg(X_WARNING, 
                 "%s: amplifier of %.3f seems unreasonable. Ignored.\n", 
                 local->name, fvalue);