fixed the healpix import test

lm/__init__.py

@@ -30,7 +30,7 @@ try:
 except(ImportError):
     try:
         import healpy as hp
-        if lv(hp.__version__) <= lv('1.8.1'):
+        if lv(hp.__version__) < lv('1.8.1'):
             raise ImportError(about._errors.cprint("ERROR: installed healpy version is older than 1.8.1!"))
     except(ImportError):
         about.infos.cprint("INFO: neither libsharp_wrapper_gl nor healpy available.")
@@ -41,7 +41,7 @@ except(ImportError):
 else:
     try:
         import healpy as hp
-        if lv(hp.__version__) <= lv('1.8.1'):
+        if lv(hp.__version__) < lv('1.8.1'):
             raise ImportError(about._errors.cprint("ERROR: installed healpy version is older than 1.8.1!"))
     except(ImportError):
         from nifty_lm import lm_space,gl_space ## import lm & gl