Avoid harmless warning about comparing unsigned with 0.

Fix warning in assert in wxProcess::SetPriority(): don't compare unsigned
priority with wxPRIORITY_MIN which is just 0, the condition is always true.

Closes #14931.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73456 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/process.cpp

@@ -179,7 +179,7 @@ bool wxProcess::Exists(int pid)
 
 void wxProcess::SetPriority(unsigned priority)
 {
-    wxCHECK_RET( priority >= wxPRIORITY_MIN && priority <= wxPRIORITY_MAX,
+    wxCHECK_RET( priority <= wxPRIORITY_MAX,
                  wxS("Invalid process priority value.") );
 
     m_priority = priority;