Fix bug in analyze.

src/metermanager.cc

@@ -384,7 +384,7 @@ public:
         mi.idsc = t.ids.back();
 
         // This will be the driver that will actually decode and print with.
-        string using_driver = "auto";
+        string using_driver;
         int using_length = 0;
         int using_understood = 0;
 
@@ -393,6 +393,8 @@ public:
         int best_understood = 0;
         string best_driver = findBestNewStyleDriver(mi, &best_length, &best_understood, t, about, input_frame, simulated, "");
 
+        if (best_driver == "") best_driver = "unknown";
+
         mi.driver_name = DriverName(best_driver);
 
         // Default to best driver....
@@ -419,12 +421,12 @@ public:
         {
             using_driver = findBestNewStyleDriver(mi, &force_length, &force_understood, t, about, input_frame, simulated,
                                                   force_driver);
-            mi.driver_name = using_driver;
-
             using_length = force_length;
             using_understood = force_understood;
         }
 
+        mi.driver_name = using_driver;
+
         auto meter = createMeter(&mi);
 
         assert(meter != NULL);

tests/test_analyze.sh

@@ -32,7 +32,7 @@ TESTRESULT="ERROR"
 
 cat > $TEST/test_expected.txt <<EOF
 Auto driver  : multical21
-Best driver  :  00/00
+Best driver  : unknown 00/00
 Using driver : multical21 00/00
 000   : 2a length (42 bytes)
 001   : 44 dll-c (from meter SND_NR)
@@ -77,7 +77,7 @@ TESTRESULT="ERROR"
 
 cat > $TEST/test_expected.txt <<EOF
 Auto driver  : multical21
-Best driver  :  00/00
+Best driver  : unknown 00/00
 Using driver : multical21 00/00
 000   : 23 length (35 bytes)
 001   : 44 dll-c (from meter SND_NR)
@@ -239,7 +239,7 @@ TESTRESULT="ERROR"
 
 cat > $TEST/test_expected.txt <<EOF
 Auto driver  : supercom587
-Best driver  :  00/00
+Best driver  : unknown 00/00
 Using driver : supercom587 00/00
 000   : ae length (174 bytes)
 001   : 44 dll-c (from meter SND_NR)