mesa: Fix compiler warnings on Windows.

src/mesa/shader/arbprogparse.c

@@ -2609,7 +2609,7 @@ parse_src_reg (GLcontext * ctx, const GLubyte ** inst,
       /* If we're referencing the Program->Parameters[] array, check if the
        * parameter is really a constant/literal.  If so, set File to CONSTANT.
        */
-      assert(*Index < Program->Base.Parameters->NumParameters);
+      assert(*Index < (GLint) Program->Base.Parameters->NumParameters);
       file = Program->Base.Parameters->Parameters[*Index].Type;
       if (file == PROGRAM_CONSTANT)
          *File = PROGRAM_CONSTANT;

src/mesa/shader/slang/slang_link.c

@@ -408,7 +408,7 @@ _slang_update_inputs_outputs(struct gl_program *prog)
             }
          }
          else if (inst->SrcReg[j].File == PROGRAM_ADDRESS) {
-            maxAddrReg = MAX2(maxAddrReg, inst->SrcReg[j].Index + 1);
+            maxAddrReg = MAX2(maxAddrReg, (GLuint) (inst->SrcReg[j].Index + 1));
          }
       }
       if (inst->DstReg.File == PROGRAM_OUTPUT) {