fix loop over config files if none was found

if no file was found the string is just "\0" and neads a head
controled while

if no config file was found exit awesome with an error message
(fail early!)

Signed-off-by: Julien Danjou <julien@danjou.info>

awesome.c

@@ -513,7 +513,8 @@ main(int argc, char **argv)
     spawn_init();
 
     /* Parse and run configuration file */
-    luaA_parserc(&xdg, confpath, true);
+    if (!luaA_parserc(&xdg, confpath, true))
+        fatal("couldn't find any rc file");
 
     xdgWipeHandle(&xdg);
 

luaa.c

@@ -835,7 +835,7 @@ luaA_parserc(xdgHandle* xdg, const char *confpatharg, bool run)
     char *tmp = confpath;
 
     /* confpath is "string1\0string2\0string3\0\0" */
-    do
+    while(*tmp)
     {
         if(luaA_loadrc(tmp, run))
         {
@@ -845,7 +845,7 @@ luaA_parserc(xdgHandle* xdg, const char *confpatharg, bool run)
         else if(!run)
             goto bailout;
         tmp += a_strlen(tmp) + 1;
-    } while(*tmp != 0);
+    }
 
 bailout: