Win32: Fix accidentally working bit tests

Good grief.

src/win32_window.c

@@ -384,13 +384,13 @@ static int getKeyMods(void)
 {
     int mods = 0;
 
-    if (GetKeyState(VK_SHIFT) & (1 << 31))
+    if (GetKeyState(VK_SHIFT) & 0x8000)
         mods |= GLFW_MOD_SHIFT;
-    if (GetKeyState(VK_CONTROL) & (1 << 31))
+    if (GetKeyState(VK_CONTROL) & 0x8000)
         mods |= GLFW_MOD_CONTROL;
-    if (GetKeyState(VK_MENU) & (1 << 31))
+    if (GetKeyState(VK_MENU) & 0x8000)
         mods |= GLFW_MOD_ALT;
-    if ((GetKeyState(VK_LWIN) | GetKeyState(VK_RWIN)) & (1 << 31))
+    if ((GetKeyState(VK_LWIN) | GetKeyState(VK_RWIN)) & 0x8000)
         mods |= GLFW_MOD_SUPER;
 
     return mods;
@@ -402,13 +402,13 @@ static int getAsyncKeyMods(void)
 {
     int mods = 0;
 
-    if (GetAsyncKeyState(VK_SHIFT) & (1 << 31))
+    if (GetAsyncKeyState(VK_SHIFT) & 0x8000)
         mods |= GLFW_MOD_SHIFT;
-    if (GetAsyncKeyState(VK_CONTROL) & (1 << 31))
+    if (GetAsyncKeyState(VK_CONTROL) & 0x8000)
         mods |= GLFW_MOD_CONTROL;
-    if (GetAsyncKeyState(VK_MENU) & (1 << 31))
+    if (GetAsyncKeyState(VK_MENU) & 0x8000)
         mods |= GLFW_MOD_ALT;
-    if ((GetAsyncKeyState(VK_LWIN) | GetAsyncKeyState(VK_RWIN)) & (1 << 31))
+    if ((GetAsyncKeyState(VK_LWIN) | GetAsyncKeyState(VK_RWIN)) & 0x8000)
         mods |= GLFW_MOD_SUPER;
 
     return mods;