fix some cases of 'return false' in functions returning a pointer or integer

panda/src/express/virtualFileMountRamdisk.cxx

@@ -242,7 +242,7 @@ open_read_file(const Filename &file) const {
   PT(FileBase) f = _root.do_find_file(file);
   ((VirtualFileMountRamdisk *)this)->_lock.release();
   if (f == (FileBase *)NULL || f->is_directory()) {
-    return false;
+    return NULL;
   }
 
   File *f2 = DCAST(File, f);
@@ -263,7 +263,7 @@ open_write_file(const Filename &file, bool truncate) {
   PT(File) f = _root.do_create_file(file);
   _lock.release();
   if (f == (File *)NULL) {
-    return false;
+    return NULL;
   }
 
   if (truncate) {
@@ -288,7 +288,7 @@ open_append_file(const Filename &file) {
   PT(File) f = _root.do_create_file(file);
   _lock.release();
   if (f == (File *)NULL) {
-    return false;
+    return NULL;
   }
 
   return new OSubStream(&f->_wrapper, 0, 0, true);
@@ -308,7 +308,7 @@ open_read_write_file(const Filename &file, bool truncate) {
   PT(File) f = _root.do_create_file(file);
   _lock.release();
   if (f == (File *)NULL) {
-    return false;
+    return NULL;
   }
 
   return new SubStream(&f->_wrapper, 0, 0);
@@ -328,7 +328,7 @@ open_read_append_file(const Filename &file) {
   PT(FileBase) f = _root.do_find_file(file);
   _lock.release();
   if (f == (FileBase *)NULL || f->is_directory()) {
-    return false;
+    return NULL;
   }
 
   File *f2 = DCAST(File, f);
@@ -350,7 +350,7 @@ get_file_size(const Filename &file, istream *stream) const {
   PT(FileBase) f = _root.do_find_file(file);
   ((VirtualFileMountRamdisk *)this)->_lock.release();
   if (f == (FileBase *)NULL || f->is_directory()) {
-    return false;
+    return 0;
   }
 
   File *f2 = DCAST(File, f);
@@ -369,7 +369,7 @@ get_file_size(const Filename &file) const {
   PT(FileBase) f = _root.do_find_file(file);
   ((VirtualFileMountRamdisk *)this)->_lock.release();
   if (f == (FileBase *)NULL || f->is_directory()) {
-    return false;
+    return 0;
   }
 
   File *f2 = DCAST(File, f);

panda/src/gobj/texturePool.cxx

@@ -258,7 +258,7 @@ ns_load_texture(const Filename &orig_filename, int primary_file_num_channels,
         // No such file.
         gobj_cat.error()
           << "Could not find " << filename << "\n";
-        return false;
+        return NULL;
       }
 
       if (gobj_cat.is_debug()) {
@@ -271,7 +271,7 @@ ns_load_texture(const Filename &orig_filename, int primary_file_num_channels,
       vfs->close_read_file(in);
 
       if (tex == (Texture *)NULL) {
-        return false;
+        return NULL;
       }
       tex->set_fullpath(filename);
       tex->clear_alpha_fullpath();
@@ -561,7 +561,7 @@ ns_load_3d_texture(const Filename &filename_pattern,
   }
 
   // Set the original filename, before we searched along the path.
-  nassertr(tex != (Texture *)NULL, false);
+  nassertr(tex != (Texture *)NULL, NULL);
   tex->set_filename(filename_pattern);
   tex->set_fullpath(filename);
   tex->_texture_pool_key = filename;
@@ -667,7 +667,7 @@ ns_load_2d_texture_array(const Filename &filename_pattern,
   }
 
   // Set the original filename, before we searched along the path.
-  nassertr(tex != (Texture *)NULL, false);
+  nassertr(tex != (Texture *)NULL, NULL);
   tex->set_filename(filename_pattern);
   tex->set_fullpath(filename);
   tex->_texture_pool_key = filename;
@@ -768,7 +768,7 @@ ns_load_cube_map(const Filename &filename_pattern, bool read_mipmaps,
   }
     
   // Set the original filename, before we searched along the path.
-  nassertr(tex != (Texture *)NULL, false);
+  nassertr(tex != (Texture *)NULL, NULL);
   tex->set_filename(filename_pattern);
   tex->set_fullpath(filename);
   tex->_texture_pool_key = filename;