trurl: on strdup() failures, exit immediately

Rather than continuing and acting weirdly.

trurl.c

@@ -1178,7 +1178,7 @@ static void trim(struct option *o)
                removed. Get a copy and edit that accordingly. */
             temp = strdup(ptr);
             if(!temp)
-              return; /* out of memory, bail out */
+              errorf(o, ERROR_MEM, "out of memory");
             temp[inslen - 2] = '*';
             temp[inslen - 1] = '\0';
             ptr = temp;
@@ -1207,6 +1207,8 @@ static void trim(struct option *o)
           qpairs[i].len = 0;
           qpairsdec[i].str = strdup(""); /* marked as deleted */
           qpairsdec[i].len = 0;
+          if(!qpairs[i].str || !qpairsdec[i].str)
+            errorf(o, ERROR_MEM, "out of memory");
         }
       }
       free(temp);
@@ -1432,6 +1434,8 @@ static void replace(struct option *o)
         qpairs[i].str = strdup("");
         qpairsdec[i].len = 0;
         qpairsdec[i].str = strdup("");
+        if(!qpairs[i].str || !qpairsdec[i].str)
+          errorf(o, ERROR_MEM, "out of memory");
         continue;
       }
       struct string *pdec =