added missing installCommand deallocation to auto-update

NOTE: function 'replaceWord' returns allocated text

src/lib/misc.c

@@ -190,6 +190,8 @@ unsigned char checkVersion(inputFlags flags)
             //REMOVE versions.json - OTHERWISE WILL CAUSE SEGFAULT IN NEXT RUN
             remove(VERSIONS_NAME);
 
+            free(installCommand);
+
             //CHECK FOR ERRORS
             if (installCode != 0)
             {