BUG: remove bogus warning about not finding a depend file, if there are no include paths

Source/cmMakeDepend.cxx

@@ -241,13 +241,13 @@ void cmDependInformation::MergeInfo(cmDependInformation* info)
 // find the full path to fname by searching the m_IncludeDirectories array
 std::string cmMakeDepend::FullPath(const char* fname)
 {
-  for(std::vector<std::string>::iterator i = m_IncludeDirectories.begin();
-      i != m_IncludeDirectories.end(); ++i)
-    {
   if(cmSystemTools::FileExists(fname))
     {
       return std::string(fname);
     }
+  for(std::vector<std::string>::iterator i = m_IncludeDirectories.begin();
+      i != m_IncludeDirectories.end(); ++i)
+    {
     std::string path = *i;
     path = path + "/";
     path = path + fname;