Small fix following code review.

theano/gof/cmodule.py

@@ -1500,11 +1500,11 @@ class GCC_compiler(object):
             for f in cxxflags:
                 #If the user give an -march=X parameter, don't add one ourself
                 if ((f.startswith("--march=") or f.startswith("-march="))):
-                    _logget.warn(
+                    _logger.warn(
                         "WARNING: your Theano flags `gcc.cxxflags` specify"
-                        " an `-march=X` flags that isn't `-march=native`.\n"
+                        " an `-march=X` flags.\n"
                         "         It is better to let Theano/g++ find it"
-                           " automatically, but we don't do it now")
+                        " automatically, but we don't do it now")
                     detect_march = False
                     break