remove security hole in e_start_main

if a file called ~/.e-mtrack existed then during startup the launcher would
read the first line of this file and set LD_PRELOAD to that value

CID 1039785

src/bin/e_start_main.c

@@ -613,13 +613,13 @@ main(int argc, char **argv)
      }
    putchar('\n');
 
-   /* mtrack memory tracker support */
    home = getenv("HOME");
    if (home)
      {
-        FILE *f;
         const char *tmps;
-
+#if 0
+        FILE *f;
+        /* mtrack memory tracker support */
         /* if you have ~/.e-mtrack, then the tracker will be enabled
          * using the content of this file as the path to the mtrack.so
          * shared object that is the mtrack preload */
@@ -643,7 +643,7 @@ main(int argc, char **argv)
                }
              fclose(f);
           }
-
+#endif
         tmps = getenv("XDG_DATA_HOME");
         if (tmps)
           snprintf(buf, sizeof(buf), "%s/Applications/.bin", tmps);