actionsapi/texlivemodules: Add exception for None values of "patterns"

Every format file has some keywords that are passed to the appropriate 
application during the build stage. However some of thes keywords, such
as "patterns" may have Null values (do not exist) or have empty string.
Thus, we add here an exception for Null values of "patterns". If no 
"patterns" keyword exist, than we create a new one with the parameter '-'
This parameter is default and is adviced from the TexLive developers itself.

pisi/actionsapi/texlivemodules.py

@@ -84,7 +84,6 @@ def install(parameters = ''):
     if handleConfigFiles():
         raise Installing, _('Handle config files failed')
 
-
 def createSymlinksFormat2Engines():
     '''Create symlinks from format to engines'''
     for formatfile in ls("%s/texmf/fmtutil/format*.cnf" % get.curDIR()):
@@ -157,7 +156,6 @@ def handleConfigFiles():
                     domove("/usr/share/texmf/%s/%s" % (dirname,configFile), "/etc/texmf/%s.d" % dirname)
                     dosym("/etc/texmf/%s.d/%s" % (dirname, configFile), "/usr/share/texmf/%s/%s" %(dirname, configFile))
 
-
 def addFormat(parameters):
     '''Add format files'''
     if not os.path.isdir("%s/texmf/fmtutil/" % get.curDIR()):
@@ -178,12 +176,13 @@ def addFormat(parameters):
             para_dict[pair[0]] = pair[1]
             if pair[0] == "patterns" and pair[1] == '':
                 para_dict["patterns"] = '-'     # Specified in the texlive-module.eclass
+            elif not pair[0] == 'patterns':
+                para_dict["patterns"] = '-'
 
     cnf_file = open('%s/texmf/fmtutil/format.%s.cnf' % (get.curDIR(),get.srcNAME()), 'a')
     cnf_file.write("%s\t%s\t%s\t%s\n" % (para_dict["name"], para_dict["engine"], para_dict["patterns"], para_dict["options"]))
     cnf_file.close()
 
-
 def moveSources():
     reloc = "texmf-dist"
 
@@ -199,7 +198,6 @@ def moveSources():
                     os.system("mkdir -p %s/%s" % (reloc,dirname))
                 shutil.move("%s" % path , "%s/%s" % (reloc,dirname))
 
-
 def buildFormatFiles():
     '''Build format files'''
     if os.path.isdir("%s/texmf/fmtutil/" % get.curDIR()):
@@ -228,7 +226,6 @@ def addLanguageDat(parameter):
         language_dat.write("=%s\n" % para_dict["synonyms"])
         language_dat.close()
 
-
 def addLanguageDef(parameter):
     '''Create language.*.def files'''
     parameter = parameter.split()
@@ -252,8 +249,6 @@ def addLanguageDef(parameter):
         language_def.write("\\addlanguage{%s}{%s}{}{%s}{%s}\n" % (para_dict["synonyms"], para_dict["file"],  para_dict["lefthyphenmin"],  para_dict["righthyphenmin"]))
         language_def.close()
 
-
-
 def generateConfigFiles():
     '''Generate config files'''
     for tlpobjfile in ls("%s/tlpkg/tlpobj/*" % get.curDIR()):