Fix a couple of bugs where we generate incorrect minidump files on Linux.o

Patch by Markus Gutschke <markus@chromium.org>.  R=thestig

Review URL: http://breakpad.appspot.com/150001
Review URL: http://breakpad.appspot.com/155001

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@649 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/linux/memory.h

@@ -148,6 +148,24 @@ class wasteful_vector {
     return used_;
   }
 
+  void resize(unsigned sz, T c = T()) {
+    // No need to test "sz >= 0", as "sz" is unsigned.
+    if (sz <= used_) {
+      used_ = sz;
+    } else {
+      unsigned a = allocated_;
+      if (sz > a) {
+        while (sz > a) {
+          a *= 2;
+        }
+        Realloc(a);
+      }
+      while (sz > used_) {
+        a_[used_++] = c;
+      }
+    }
+  }
+
   T& operator[](size_t index) {
     return a_[index];
   }