Fix Coverity reports. (Mostly use of uninitialised values.)

CID=537,103419,103631,103632,103633

Review URL: https://codereview.appspot.com/5936047

git-svn-id: http://skia.googlecode.com/svn/trunk@3522 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 9 insertions, 3 deletions

diff --git a/src/ports/SkOSFile_stdio.cpp b/src/ports/SkOSFile_stdio.cpp
index 764b466878..1fc7d6a4f3 100644
--- a/src/ports/SkOSFile_stdio.cpp
+++ b/src/ports/SkOSFile_stdio.cpp
@@ -36,10 +36,16 @@ size_t sk_fgetsize(SkFILE* f)
 {
     SkASSERT(f);
 
-    size_t  curr = ::ftell((FILE*)f);       // remember where we are
+    long curr = ::ftell((FILE*)f);       // remember where we are
+    if (curr < 0) {
+        return 0;
+    }
     ::fseek((FILE*)f, 0, SEEK_END);         // go to the end
-    size_t size = ::ftell((FILE*)f);        // record the size
-    ::fseek((FILE*)f, (long)curr, SEEK_SET);        // go back to our prev loc
+    long size = ::ftell((FILE*)f);        // record the size
+    if (size < 0) {
+        size = 0;
+    }
+    ::fseek((FILE*)f, SEEK_SET);        // go back to our prev loc
     return size;
 }