Empty strings are not equal to any number, so all comparisons against

dlls/msi/cond.y

@@ -194,12 +194,18 @@ boolean_factor:
   | symbol_s operator value_i
         {
             int num;
-            $$ = num_from_prop( $1, &num ) && compare_int( num, $2, $3 );
+            if (num_from_prop( $1, &num ))
+                $$ = compare_int( num, $2, $3 );
+            else 
+                $$ = ($2 == COND_NE || $2 == COND_INE );
         }
   | value_i operator symbol_s
         {
             int num;
-            $$ = num_from_prop( $3, &num ) && compare_int( $1, $2, num );
+            if (num_from_prop( $3, &num ))
+                $$ = compare_int( $1, $2, num );
+            else 
+                $$ = ($2 == COND_NE || $2 == COND_INE );
         }
   | symbol_s operator symbol_s
         {

dlls/msi/tests/package.c

@@ -599,6 +599,24 @@ void test_condition(void)
     r = MsiEvaluateCondition(hpkg, "bandalmael=0");
     ok( r == MSICONDITION_FALSE, "wrong return val\n");
 
+    r = MsiEvaluateCondition(hpkg, "bandalmael<>0");
+    ok( r == MSICONDITION_TRUE, "wrong return val\n");
+
+    r = MsiEvaluateCondition(hpkg, "bandalmael<0");
+    ok( r == MSICONDITION_FALSE, "wrong return val\n");
+
+    r = MsiEvaluateCondition(hpkg, "bandalmael>0");
+    ok( r == MSICONDITION_FALSE, "wrong return val\n");
+
+    r = MsiEvaluateCondition(hpkg, "bandalmael>=0");
+    ok( r == MSICONDITION_FALSE, "wrong return val\n");
+
+    r = MsiEvaluateCondition(hpkg, "bandalmael<=0");
+    ok( r == MSICONDITION_FALSE, "wrong return val\n");
+
+    r = MsiEvaluateCondition(hpkg, "bandalmael~<>0");
+    ok( r == MSICONDITION_TRUE, "wrong return val\n");
+
     MsiSetProperty(hpkg, "bandalmael", "0" );
     r = MsiEvaluateCondition(hpkg, "bandalmael=0");
     ok( r == MSICONDITION_TRUE, "wrong return val\n");
@@ -646,6 +664,8 @@ void test_condition(void)
     MsiSetProperty(hpkg, "bandalmael", "0.0" );
     r = MsiEvaluateCondition(hpkg, "bandalmael=0");
     ok( r == MSICONDITION_FALSE, "wrong return val\n");
+    r = MsiEvaluateCondition(hpkg, "bandalmael<>0");
+    ok( r == MSICONDITION_TRUE, "wrong return val\n");
 
     MsiCloseHandle( hpkg );
 }