Issue #250 - Fix improper handling of "Upos" joystick axis

- Not sure if this fixes the actual issue, but there is definitely an
error as identified by fatavatar in the issue discussion (Upos axis was
being matched to Up due to the string matching method)

src/fe_input.cpp

@@ -158,10 +158,6 @@ const char *FeInputSingle::mouseStrings[] =
 
 const char *FeInputSingle::joyStrings[] =
 {
-	"Up",
-	"Down",
-	"Left",
-	"Right",
 	"Zpos",
 	"Zneg",
 	"Rpos",
@@ -174,6 +170,10 @@ const char *FeInputSingle::joyStrings[] =
 	"PovXneg",
 	"PovYpos",
 	"PovYneg",
+	"Up",
+	"Down",
+	"Left",
+	"Right",
 	"Button",
 	NULL
 };

src/fe_input.hpp

@@ -50,9 +50,9 @@ class FeInputSingle
 
 	enum JoyCode
 	{
-		JoyUp, JoyDown, JoyLeft, JoyRight, JoyZPos, JoyZNeg,
-		JoyRPos, JoyRNeg, JoyUPos, JoyUNeg, JoyVPos, JoyVNeg,
+		JoyZPos, JoyZNeg, JoyRPos, JoyRNeg, JoyUPos, JoyUNeg, JoyVPos, JoyVNeg,
 		JoyPOVXPos, JoyPOVXNeg, JoyPOVYPos, JoyPOVYNeg,
+		JoyUp, JoyDown, JoyLeft, JoyRight,
 		JoyButton0 // up to sf::Joystick::ButtonCount buttons supported starting from JoyButton0
 	};