block: Drop some superfluous casts from void *

They clutter the code.  Unfortunately, I can't figure out how to make
Coccinelle drop all of them, so I have to settle for common special
cases:

    @@
    type T;
    T *pt;
    void *pv;
    @@
    - pt = (T *)pv;
    + pt = pv;
    @@
    type T;
    @@
    - (T *)
      (\(g_malloc\|g_malloc0\|g_realloc\|g_new\|g_new0\|g_renew\|
	 g_try_malloc\|g_try_malloc0\|g_try_realloc\|
	 g_try_new\|g_try_new0\|g_try_renew\)(...))

Topped off with minor manual style cleanups.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/vhdx-log.c

@@ -923,7 +923,7 @@ static int vhdx_log_write(BlockDriverState *bs, BDRVVHDXState *s,
     buffer = qemu_blockalign(bs, total_length);
     memcpy(buffer, &new_hdr, sizeof(new_hdr));
 
-    new_desc = (VHDXLogDescriptor *) (buffer + sizeof(new_hdr));
+    new_desc = buffer + sizeof(new_hdr);
     data_sector = buffer + (desc_sectors * VHDX_LOG_SECTOR_SIZE);
     data_tmp = data;
 

block/vvfat.c

@@ -732,7 +732,7 @@ static int read_directory(BDRVVVFATState* s, int mapping_index)
 	if(first_cluster == 0 && (is_dotdot || is_dot))
 	    continue;
 
-	buffer=(char*)g_malloc(length);
+	buffer = g_malloc(length);
 	snprintf(buffer,length,"%s/%s",dirname,entry->d_name);
 
 	if(stat(buffer,&st)<0) {
@@ -767,7 +767,7 @@ static int read_directory(BDRVVVFATState* s, int mapping_index)
 
 	/* create mapping for this file */
 	if(!is_dot && !is_dotdot && (S_ISDIR(st.st_mode) || st.st_size)) {
-	    s->current_mapping=(mapping_t*)array_get_next(&(s->mapping));
+	    s->current_mapping = array_get_next(&(s->mapping));
 	    s->current_mapping->begin=0;
 	    s->current_mapping->end=st.st_size;
 	    /*
@@ -811,12 +811,12 @@ static int read_directory(BDRVVVFATState* s, int mapping_index)
     }
 
      /* reget the mapping, since s->mapping was possibly realloc()ed */
-    mapping = (mapping_t*)array_get(&(s->mapping), mapping_index);
+    mapping = array_get(&(s->mapping), mapping_index);
     first_cluster += (s->directory.next - mapping->info.dir.first_dir_index)
 	* 0x20 / s->cluster_size;
     mapping->end = first_cluster;
 
-    direntry = (direntry_t*)array_get(&(s->directory), mapping->dir_index);
+    direntry = array_get(&(s->directory), mapping->dir_index);
     set_begin_of_direntry(direntry, mapping->begin);
 
     return 0;

hw/ide/microdrive.c

@@ -567,7 +567,7 @@ PCMCIACardState *dscm1xxxx_init(DriveInfo *dinfo)
     }
     md->bus.ifs[0].drive_kind = IDE_CFATA;
     md->bus.ifs[0].mdata_size = METADATA_SIZE;
-    md->bus.ifs[0].mdata_storage = (uint8_t *) g_malloc0(METADATA_SIZE);
+    md->bus.ifs[0].mdata_storage = g_malloc0(METADATA_SIZE);
 
     return PCMCIA_CARD(md);
 }