Don't make server resets depend on # of files analyzed

It causes self-repeating resets on projects with many files

Closes #146

lib/tern.js

@@ -80,7 +80,7 @@
 
     this.handlers = Object.create(null);
     this.files = [];
-    this.analyses = 0;
+    this.uses = 0;
     this.pending = 0;
     this.asyncError = null;
     this.passes = Object.create(null);
@@ -108,7 +108,7 @@
     },
     reset: function() {
       this.cx = new infer.Context(this.defs, this);
-      this.analyses = 0;
+      this.uses = 0;
       for (var i = 0; i < this.files.length; ++i) clearFile(this, this.files[i]);
       this.signal("reset");
     },
@@ -120,7 +120,7 @@
       var self = this;
       doRequest(this, doc, function(err, data) {
         c(err, data);
-        if (self.analyses > 40) {
+        if (self.uses > 40) {
           self.reset();
           analyzeAll(self, function(){});
         }
@@ -170,6 +170,7 @@
     if (!query) c(null, {});
 
     var files = doc.files || [];
+    if (files.length) ++srv.uses;
     for (var i = 0; i < files.length; ++i) {
       var file = files[i];
       ensureFile(srv, file.name, file.type == "full" ? file.text : null)
@@ -206,7 +207,6 @@
   }
 
   function analyzeFile(srv, file) {
-    ++srv.analyses;
     infer.withContext(srv.cx, function() {
       file.scope = srv.cx.topScope;
       srv.signal("beforeLoad", file);