bugfix in yet another message (will it ever stop)

more error messages for the parser to make them easier to find.

src/common/kernel/magic.c

@@ -2668,7 +2668,7 @@ magic(void)
         * gezaubert, co->level ist aber defaultmäßig Stufe des Magiers */
         if (spl_costtyp(sp) != SPC_FIX) {
           ADDMSG(&u->faction->msgs, msg_message("missing_components", 
-            "unit spell level", u, sp, level));
+            "unit spell level", u, sp, co->level));
         }
       }
 

src/common/util/translation.c

@@ -224,7 +224,10 @@ parse_symbol(opstack ** stack, const char* in, const void * userdata)
 		}
 		++in;
 		foo = find_function(symbol);
-		if (foo==NULL) return NULL;
+    if (foo==NULL) {
+      log_error(("parser does not know about \"%s\" function.\n", symbol));
+      return NULL;
+    }
 		foo->parse(stack, userdata); /* will pop parameters from stack (reverse order!) and push the result */
 	} else {
 		variable * var = find_variable(symbol);
@@ -232,7 +235,10 @@ parse_symbol(opstack ** stack, const char* in, const void * userdata)
 			++in;
 		}
 		/* it's a constant (variable is a misnomer, but heck, const was taken;)) */
-		if (var==NULL) return NULL;
+    if (var==NULL) {
+      log_error(("parser does not know about \"%s\" variable.\n", symbol));
+      return NULL;
+    }
 		opush(stack, var->value);
 	}
 	return in;

src/res/messages.xml

@@ -1402,7 +1402,7 @@
       <arg name="spell" type="spell"/>
     </type>
     <text locale="de">"$unit($unit) hat nur genügend Komponenten um $spell($spell) auf Stufe $int($level) zu zaubern."</text>
-    <text locale="en">"$unit($unit) has insufficient components to cast $spell($spell) on level $level($level)."</text>
+    <text locale="en">"$unit($unit) has insufficient components to cast $spell($spell) on level $int($level)."</text>
   </message>
   <message name="patzer" section="magic">
     <type>