MIPS: We should never allocate a 0-sized buffer, so never grow from 0.

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index e959b41adfee2eb2adc1e50ed1ce5cb7367a9594..936a73b5f9e2930682e590a0de934606b523497a 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -1974,9 +1974,7 @@ void Assembler::GrowBuffer() {
 
   // Compute new buffer size.
   CodeDesc desc;  // The new buffer.
-  if (buffer_size_ < 4*KB) {
-    desc.buffer_size = 4*KB;
-  } else if (buffer_size_ < 1*MB) {
+  if (buffer_size_ < 1 * MB) {
     desc.buffer_size = 2*buffer_size_;
   } else {
     desc.buffer_size = buffer_size_ + 1*MB;