Add a function prototype in order to fix a compiler warning.

FossilOrigin-Name: 49aec9718d61c9f12aed96f530128666c3b01c81

manifest

@@ -1,5 +1,5 @@
-C Merge\supdates\sfrom\strunk.
-D 2016-04-21T15:03:37.535
+C Add\sa\sfunction\sprototype\sin\sorder\sto\sfix\sa\scompiler\swarning.
+D 2016-04-21T15:24:46.372
 F Makefile.in eba680121821b8a60940a81454316f47a341487a
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 71b8b16cf9393f68e2e2035486ca104872558836
@@ -366,7 +366,7 @@ F src/pager.c bb8c7ff706aa88e7c2ec9a6175a128c01bc3ae5f
 F src/pager.h 329bdf078a4e0a3b35084534d58625d21fd03681
 F src/parse.y 10eb2f3fb62341291528c7984498054731f9d31e
 F src/pcache.c b3230ecfc7f797063fbe167f2845da363e8f07f8
-F src/pcache.h 60bc9893bfc0e16f8178fb5d8b6fcb8fab1d93c0
+F src/pcache.h 6b865be765d1ebd06145219550b10921c7da7cc9
 F src/pcache1.c c40cdb93586e21b5dd826b5e671240bd91c26b05
 F src/pragma.c faf42922bb7ab2f6672cb550356c1967abae3c84
 F src/pragma.h 64c78a648751b9f4f297276c4eb7507b14b4628c
@@ -1484,7 +1484,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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-R 46a947ce1c80cd48530d3e6dff00dfca
+P cc28106e5c196c0a9678fbbd06f6afd49271a8e8
+R c97bc8da233adc2bbb054b217c885bd5
 U drh
-Z 049109eccf475c334bc4eb599a0e0693
+Z fa8f1e96dc1996c819bff77f7b75b34d

manifest.uuid

@@ -1 +1 @@
-cc28106e5c196c0a9678fbbd06f6afd49271a8e8
+49aec9718d61c9f12aed96f530128666c3b01c81

src/pcache.h

@@ -99,6 +99,7 @@ void sqlite3PcacheDrop(PgHdr*);         /* Remove page from cache */
 void sqlite3PcacheMakeDirty(PgHdr*);    /* Make sure page is marked dirty */
 void sqlite3PcacheMakeClean(PgHdr*);    /* Mark a single page as clean */
 void sqlite3PcacheCleanAll(PCache*);    /* Mark all dirty list pages as clean */
+void sqlite3PcacheClearWritable(PCache*);
 
 /* Change a page number.  Used by incr-vacuum. */
 void sqlite3PcacheMove(PgHdr*, Pgno);