add .exe only on windows (not on linux or macosx)

Pm/PmPath.icl

@@ -49,7 +49,7 @@ add_dot_exe_if_necessary module_name
 
 MakeExecPathname :: !String -> Pathname;
 MakeExecPathname name
-	= PlatformDependant
+	= IF_WINDOWS
 		(add_dot_exe_if_necessary (RemoveSuffix name))	// Win
 		(RemoveSuffix name)				// Mac
 

Pm/PmProject.icl

@@ -102,7 +102,7 @@ PR_NewProject main_module_file_name eo compilerOptions cgo ao prjpaths linkOptio
 	= { PR_InitProject
 	& saved			= False
 	, exec			= False
-	, execpath		= PlatformDependant
+	, execpath		= IF_WINDOWS
 						("{Project}"+++DirSeparatorString+++add_dot_exe_if_necessary modname)	// Win
 						("{Project}"+++DirSeparatorString+++modname)				// Mac
 	, inflist		=