File lensfun-fixcrash.patch of Package lensfun

--- trunk/libs/lensfun/database.cpp	2011/01/04 21:04:03	129
+++ trunk/libs/lensfun/database.cpp	2011/01/07 11:33:18	130
@@ -152,27 +152,28 @@
     }
     else if (!strcmp (element_name, "mount"))
     {
-        if (!strcmp (ctx, "lensdatabase"))
+        if (ctx && !strcmp (ctx, "lensdatabase"))
         {
             pd->mount = new lfMount ();
             goto chk_no_attrs;
         }
-        else if (!strcmp (ctx, "camera") ||
-                 !strcmp (ctx, "lens"))
+        else if (ctx &&
+                 (!strcmp (ctx, "camera") ||
+                  !strcmp (ctx, "lens")))
             goto chk_no_attrs;
         else
             goto bad_ctx;
     }
     else if (!strcmp (element_name, "camera"))
     {
-        if (strcmp (ctx, "lensdatabase"))
+        if (!ctx || strcmp (ctx, "lensdatabase"))
             goto bad_ctx;
         pd->camera = new lfCamera ();
         goto chk_no_attrs;
     }
     else if (!strcmp (element_name, "lens"))
     {
-        if (strcmp (ctx, "lensdatabase"))
+        if (!ctx || strcmp (ctx, "lensdatabase"))
             goto bad_ctx;
         pd->lens = new lfLens ();
         pd->lens->Type = LF_RECTILINEAR;
@@ -180,7 +181,7 @@
     }
     else if (!strcmp (element_name, "focal"))
     {
-        if (strcmp (ctx, "lens") || !pd->lens)
+        if (!ctx || strcmp (ctx, "lens") || !pd->lens)
             goto bad_ctx;
 
         for (i = 0; attribute_names [i]; i++)
@@ -195,7 +196,7 @@
     }
     else if (!strcmp (element_name, "aperture"))
     {
-        if (strcmp (ctx, "lens") || !pd->lens)
+        if (!ctx || strcmp (ctx, "lens") || !pd->lens)
             goto bad_ctx;
 
         for (i = 0; attribute_names [i]; i++)
@@ -210,7 +211,7 @@
     }
     else if (!strcmp (element_name, "center"))
     {
-        if (strcmp (ctx, "lens") || !pd->lens)
+        if (!ctx || strcmp (ctx, "lens") || !pd->lens)
             goto bad_ctx;
 
         for (i = 0; attribute_names [i]; i++)
@@ -223,7 +224,7 @@
     }
     else if (!strcmp (element_name, "cci"))
     {
-        if (strcmp (ctx, "lens") || !pd->lens)
+        if (!ctx || strcmp (ctx, "lens") || !pd->lens)
             goto bad_ctx;
 
         for (i = 0; attribute_names [i]; i++)
@@ -238,19 +239,19 @@
     }
     else if (!strcmp (element_name, "type"))
     {
-        if (strcmp (ctx, "lens") || !pd->lens)
+        if (!ctx || strcmp (ctx, "lens") || !pd->lens)
             goto bad_ctx;
         goto chk_no_attrs;
     }
     else if (!strcmp (element_name, "calibration"))
     {
-        if (strcmp (ctx, "lens"))
+        if (!ctx || strcmp (ctx, "lens"))
             goto bad_ctx;
         goto chk_no_attrs;
     }
     else if (!strcmp (element_name, "distortion"))
     {
-        if (strcmp (ctx, "calibration"))
+        if (!ctx || strcmp (ctx, "calibration"))
             goto bad_ctx;
 
         lfLensCalibDistortion dc;
@@ -301,7 +302,7 @@
     }
     else if (!strcmp (element_name, "tca"))
     {
-        if (strcmp (ctx, "calibration"))
+        if (!ctx || strcmp (ctx, "calibration"))
             goto bad_ctx;
 
         lfLensCalibTCA tcac;
@@ -342,7 +343,7 @@
     }
     else if (!strcmp (element_name, "vignetting"))
     {
-        if (strcmp (ctx, "calibration"))
+        if (!ctx || strcmp (ctx, "calibration"))
             goto bad_ctx;
 
         lfLensCalibVignetting vc;